Michał Nowak

Creatine

One of the most thoroughly studied supplements in the world — supports strength, muscle mass and, according to newer research, cognitive function.

Collagen

Collagen peptides are often used as a supportive measure for skin elasticity and joint comfort — the evidence is promising but still limited.

Reishi (Ganoderma lucidum)

A functional mushroom with more than 2,000 years of history in Chinese and Japanese medicine, studied for its immune-modulating effects — human clinical evidence, however, remains modest and partly contradictory.

Cordyceps militaris

A laboratory-cultivated functional mushroom — this is the species behind almost every 'cordyceps' supplement sold today. High, stable cordycepin content, but evidence for improved physical performance in humans is still mixed.

Shiitake

A culinary-functional mushroom rich in lentinan and beta-glucans, studied clinically for immune modulation and lipid profile — one of the best-researched functional mushrooms on the market.

Poria (Fu Ling)

A sclerotium-forming fungus present in Chinese medicine formulas as Fu Ling for centuries — as a standalone supplement, though, it has very modest, indirect clinical data in humans.

Umbrella Polypore (Zhu Ling)

A mushroom present in Chinese medicine recipes as Zhu Ling for 2,500 years — a potent diuretic. Modern research on the isolated polysaccharide PPS focuses mainly on hepatitis B and anticancer mechanisms in a test tube, not standalone supplementation.

Birch Polypore (Fomitopsis betulina)

A bracket fungus common on birches in Poland, known for its discovery alongside Ötzi's remains — historically fascinating, but still not clinically confirmed as a supplement.

Artist's Conk (Ganoderma applanatum)

A common, woody bracket fungus famous for the fact that you can draw on it — studied in the lab for polysaccharides and triterpenes, but not a popular dietary supplement.

Beefsteak Fungus (Fistulina hepatica)

A distinctive, 'bleeding' mushroom that looks like raw meat — prized more as a culinary curiosity than a supplement; preliminary chemical studies point to a very high content of phenolic compounds.

Enokitake (Flammulina velutipes)

A popular culinary mushroom, also known in English-speaking countries as Velvet Foot, studied in the lab for its immunomodulatory protein FIP-fve — on the market almost exclusively as food.

Oyster Mushroom (Pleurotus ostreatus)

One of the most popular edible mushrooms in Poland, containing a natural compound structurally similar to lovastatin — studied mainly for its effects on lipid profile and immunity.

Elm Oyster Mushroom (Hypsizygus ulmarius)

A culinary mushroom closely related to shimeji, studied in the lab and in animals for antioxidant, hepatoprotective, and blood-sugar-supporting effects — with no clinical studies in humans.

Wood Ear (Auricularia auricula-judae)

A jelly fungus popular in Asian cuisine, growing in Poland mainly on elder — studied since the 1980s for anticoagulant and antiplatelet effects relevant to people taking blood-thinning medication.

Ganoderma tsugae (Hemlock Reishi)

A North American relative of reishi that grows on eastern hemlock — popular among herbalists in the US and Canada as 'hemlock reishi,' but with a much thinner body of scientific research.

Ganoderma sinense (Black Reishi)

A rare, dark-purple bracket fungus known in Chinese medicine as 'Zi Zhi' — unlike Ganoderma lingzhi, this is a genetically distinct species, with its own, smaller body of research: a chemotherapy-support drug registered in China, plus preliminary data on protecting the heart from anthracycline cardiotoxicity.

Willow bracket (Phellinus igniarius)

A common, hard bracket fungus that mainly parasitizes willows, with documented traditional use as tinder and a brewed drink among Siberian and North American peoples — but with no significant clinical studies in humans.

Hairy Bracket (Trametes hirsuta)

A common bracket fungus closely related to turkey tail, valued in biotechnology as a laccase producer. No clinical trials in humans and no presence on the supplement market.

Mossy Maze Polypore (Cerrena unicolor)

A common European bracket fungus that decomposes dead hardwood, known in biotechnology mainly as a source of the enzyme laccase — with no culinary or supplement history and no studies in humans.

Intermittent Fasting (IF)

An eating pattern based on cycles of eating and fasting, e.g., 16:8 — the evidence is solid for weight reduction, less conclusive for effects independent of caloric deficit.

Mediterranean Diet

The best-studied eating pattern for cardiovascular health and longevity.

Strength Training

One of the single strongest predictors of healthy aging — it shapes muscle mass, bone density, and insulin sensitivity.

Sauna (Thermal Heat Therapy)

Regular sauna use is linked in cohort studies to lower cardiovascular mortality risk — the strongest data comes from Finland.

Ketogenic Diet

A very low-carbohydrate, high-fat eating pattern that puts the body into a state of ketosis — with strong evidence in drug-resistant epilepsy and moderate evidence for short-term weight loss.

DASH Diet

An eating pattern developed specifically to lower blood pressure — one of the best-studied dietary approaches in cardiology, confirmed by multicenter NIH-funded trials.

Vegan Diet

An eating pattern that fully excludes animal products — with real cardiometabolic benefits, but one that requires deliberate planning and vitamin B12 supplementation.

Paleo Diet

An eating pattern recreating a presumed hunter-gatherer diet — it eliminates grains, dairy, and processed food, but evidence for its advantage over other diets is limited and based on small, short studies.

Low-Glycemic Diet

An eating pattern based on choosing carbohydrates by glycemic index and glycemic load — with solid evidence supporting glycemic control in people with type 2 diabetes and insulin resistance.

VO2 max

The maximum amount of oxygen the body can take up during exercise — one of the strongest, well-documented predictors of lifespan, measurable in a sports diagnostics lab.

Adaptive Thermogenesis

A drop in resting energy expenditure beyond what body-mass loss alone would predict — the mechanism explaining why weight loss naturally slows over time, even with a maintained calorie deficit.

Panax Ginseng

One of the longest-used adaptogens in traditional medicine — with moderate evidence for improved cognitive function and reduced chronic fatigue.

High-Intensity Interval Training (HIIT)

Short, intense bursts of effort produce comparable or better metabolic results than longer moderate-intensity training — at a substantially smaller time investment.

Autophagy

An intracellular 'housekeeping' process that clears out damaged proteins and organelles, whose discovery earned a Nobel Prize — one of the key mechanisms studied in the context of slowing aging.

Heart Rate Variability (HRV)

The variability in the time between successive heartbeats is one of the best non-invasive indicators of autonomic nervous system balance — today available in nearly every sports watch.

Eleuthero (Siberian Ginseng)

Despite its common name 'Siberian ginseng,' this is a completely different plant from Panax ginseng — with a distinct profile of active compounds and its own, equally promising evidence base.

Citicoline (CDP-choline)

A compound naturally occurring in the body as an intermediate in phosphatidylcholine synthesis — one of the few nootropics with real, though moderate, evidence for improved attention and psychomotor speed.

Zone 2 Endurance Training

Long, easy aerobic exertion kept slow enough that you can hold a conversation — deceptively boring, but it's exactly this that builds the fitness foundation HIIT's effects rest on.

Cold Plunges and Cold Exposure

Controlled exposure to cold water has become one of the most recognizable biohacking practices — with real, though more modest than pop culture suggests, scientific backing.

Red Light Therapy (Photobiomodulation)

Exposure to red and near-infrared light has become a popular biohacking tool — with real, though still limited, evidence mainly in the context of skin health.

The Myth of Multitasking

What we experience as 'doing several things at once' is actually rapid switching of attention between tasks — and every switch carries a measurable, cumulative cognitive cost.

Uric Acid (Blood Test)

Uric acid is the end product of purine breakdown — its blood test helps assess the risk of gout and kidney stones, but a single result on its own neither confirms nor rules out disease.

Creatine Kinase (CK/CPK)

Creatine kinase (CK, formerly CPK) is an enzyme released into the blood when muscle tissue — skeletal or cardiac — is damaged. It's ordered both in the diagnosis of muscle disease and in monitoring statin safety, as well as by athletes after intense training, where a moderately elevated result is a physiological phenomenon rather than a pathology.

Glycine

The simplest protein-building amino acid, which also acts as an inhibitory neurotransmitter — taken as a supplement before bed, it shortens time to fall asleep and improves subjective sleep quality through a mild drop in body temperature, without the sedative action typical of classic sleep medication.

Sleep, Athletic Performance and Recovery

For an athlete, sleep is what strength training is for muscle — part of the program, not a luxury you skip when time is tight. Even one night of shortened sleep measurably reduces endurance, strength, speed, and decision accuracy, and chronic sleep loss raises injury risk more than training volume itself.

X-Ray (Radiography)

An X-ray is the oldest and still fastest-available medical imaging method — a single, flat projection of X-radiation that can assess bones, lungs, and select chest or abdominal structures within seconds, at a low radiation dose compared with CT.

Carpal Tunnel Syndrome

The most common compressive neuropathy in humans — a condition in which the median nerve is compressed in the narrow carpal tunnel of the wrist, causing numbness, tingling, and pain in the hand, typically worsening at night. A common, well-understood problem that, with early diagnosis, is usually treated successfully with conservative care, but if neglected can lead to permanent nerve damage.

Sciatica

Radiating pain along the path of the sciatic nerve, most often caused by a herniated disc compressing a nerve root — the good news is that the large majority of episodes resolve on their own within a few weeks of conservative treatment.

Kidney Stones

Mineral deposits forming in the urinary tract when the concentration of lithogenic substances in urine exceeds its solubility threshold — a classic RCT by Borghi showed that simply increasing fluid intake by nearly half cuts recurrence risk.

Gout

An inflammatory joint disease caused by monosodium urate crystal deposition due to chronic hyperuricemia — affecting up to several percent of the population, with a strong male predominance, and one of the few rheumatic diseases that can be effectively controlled by treating to a specific therapeutic target.

At-Home Dermarolling and Microneedling

Micro-puncturing the skin with a roller covered in hundreds of microneedles — controlled, tiny injuries that trigger a healing response and collagen production. The procedure has solid support in the dermatology literature, above all for acne scarring, but performed at home it carries real, context-specific risks that simply don't exist in a dermatologist's office.

Keto, DASH, or Mediterranean? Which Approach Has the Strongest Evidence for Weight Loss

We compare three popular eating patterns based on real scientific evidence — not social media popularity — to help you choose the approach that fits your goal.

July 31, 2026

Creatine and the Brain: What a New Meta-Analysis Shows About Cognitive Function

For decades, creatine has been associated mainly with the gym, but a growing body of research suggests its role in the brain — an organ with enormous energy demands — may be just as interesting as its role in muscle.

August 4, 2026

What we now know about NMN and longevity — a review of human studies

NMN, a precursor of NAD+, has for years been one of the most hotly debated supplements in the biohacking community. We look at what the latest clinical trials in humans show, as distinct from earlier studies in mice.

August 11, 2026

How to build a workout routine when you're short on time — a minimalist's guide

Lack of time is the most commonly cited reason for giving up regular physical activity. We show a research-backed, minimalist way to stay fit on a very limited time budget.

August 11, 2026

Adaptogen Ranking: Which One Works Best for Stress, Sleep and Energy

Ashwagandha, rhodiola, ginseng, eleuthero — they're all called 'adaptogens', but they have different mechanisms and different strengths. We sort out which one fits which context, based purely on the strength of the available evidence.

August 18, 2026

Nootropics Ranking: Focus Substances With the Strongest Evidence

The 'brain booster' market is full of promises with nothing to back them up. We've compiled the nootropics that actually have randomized clinical trials behind them, ranked by real strength of evidence — not social-media popularity.

August 18, 2026

Cold Showers and Immunity: Do You Really Get Sick Less?

"Cold exposure boosts your immune system" is one of the most repeated claims in biohacking — but the newest, largest meta-analysis on the topic shows something more complex: inflammation rises short-term, and immune markers don't budge. There is, though, one real, if surprising, long-term effect. We break down the evidence.

August 22, 2026

HRV Training and Resonance Breathing: Does It Really Reduce Stress?

Your watch shows your HRV, but the measurement itself changes nothing. HRV training (biofeedback) is a specific technique — breathing at a resonance rate, usually around 6 breaths per minute — with real scientific support for reducing stress and anxiety. Here's how it works and how to start.

August 22, 2026

Red Light Therapy and Muscle Recovery: When Does It Actually Work?

Photobiomodulation is mostly associated with skin, but a growing number of meta-analyses examine its effect on muscle strength and recovery. The result is more complex than a simple "works" or "doesn't work" — WHEN you apply the light and how trained the person is turn out to matter most. We break down the evidence.

August 22, 2026

Zone 2 vs. HIIT: Which Improves VO2max More Effectively?

This is one of the most disputed topics in endurance biohacking. One meta-analysis suggests HIIT has an edge, another finds no difference between intervals and continuous training — but with a significant caveat about the quality of the studies analyzed. We check what the data really show before you pick one protocol over the other.

August 22, 2026

How Many Sets Per Week Per Muscle Group? What the Meta-Analyses Show

"More is better" is an intuitive but incomplete summary of what's known about training volume. The classic Schoenfeld meta-analysis shows a continuous dose-response relationship, but a newer systematic review suggests a clear plateau around 12-20 sets per week. We break down these two seemingly contradictory conclusions.

August 22, 2026

Beta-Alanine and Exercise Capacity: Who Does It Actually Work For?

Beta-alanine is one of the few pre-workout supplements whose effect can be felt almost tangibly — the characteristic skin tingling (paresthesia) after a dose leads many people to take effectiveness for granted. The largest available meta-analysis, covering over 1,400 participants and 65 different research protocols, shows something that requires real clarification: not every type of exercise responds to it the same way.

August 25, 2026

Citrulline Malate and Training Performance: +6.4% Reps, or No Real Effect at All?

Citrulline malate is a staple ingredient in nearly every pre-workout on the market, marketed as a way to squeeze out noticeably more reps at the gym. The largest meta-analysis on this topic to date (2026, 30 studies, 644 people) found a real but small effect — about 6.4% more reps in an earlier, narrower analysis — rated low certainty of evidence, while a separate, independent meta-analysis of the same question found no statistically significant effect at all.

August 25, 2026

Fasted Training and Fat Loss: A Real Mechanism, a Wrong Conclusion?

Fasted training has a reputation as a "hack" for faster fat loss — and, rare in the world of popular fitness advice, the underlying mechanism itself is scientifically true. The problem is that the study testing whether this mechanism translates into a real, long-term difference in body composition gave an answer that undermines the entire rationale for this strategy as a weight-loss tool.

August 25, 2026

Creatine and Hair Loss: Does the Supplement Really Raise DHT?

"Creatine causes baldness" is one of the most repeated warnings in gym culture — and it rests on exactly one study from 2009, which never measured hair loss at all. That study did show a real spike in DHT, the hormone responsible for pattern hair loss, up 56% after a week of creatine loading. The catch: nobody since has ever tested whether that DHT spike actually translates into real hair loss — and those are very different questions.

August 23, 2026

Cold Water After Strength Training: Does It Help or Block Muscle Growth?

An ice bath after a strength session is associated with recovery and professionalism — yet a 12-week study shows the opposite: people using cold water after every workout gained significantly less strength and muscle mass than people using standard active recovery. The culprit is suppression of the very molecular signals muscle relies on to grow after exercise.

August 23, 2026

The Post-Workout Anabolic Window: Myth or Real Time Limit?

"You have 30 minutes after training to eat protein, or you lose the gains" is one of the most deeply rooted beliefs in gym culture. A meta-analysis covering over 1,000 participants shows it's an oversimplification based on misreading short-term cellular signaling data. What matters is total daily protein intake, not a rigid minute-count after your last rep.

August 23, 2026

High-Protein Diets and Kidneys: Do They Harm Healthy People?

"Too much protein wrecks your kidneys" is a warning almost everyone hears the moment they start eating more meat or protein powder. A systematic review shows higher protein intake raises glomerular filtration rate (GFR) — but that means the kidney is working harder within normal range, not that it's being damaged. There's an honest catch, though: almost no study ran longer than six months, so the truly long-term question remains open.

August 23, 2026

Alcohol After Training: How Much Do You Really Lose From Your Muscle Gains?

One beer or a couple of drinks after a hard workout doesn't zero out the whole session's effects — but it isn't neutral either. A study published in PLOS ONE shows that alcohol consumed after strength training clearly lowers the rate of muscle protein synthesis, and pairing alcohol with protein doesn't fully protect against that drop. The good news: even after alcohol, protein synthesis remains elevated above resting levels.

August 23, 2026

Non-Alcoholic Beer and Marathon Recovery: Does It Really Help Runners?

It sounds like a gym joke, yet it's one of the more intriguing findings in sports recovery science: a double-blind randomized controlled trial on 277 marathon runners found that drinking non-alcoholic beer for several weeks before and after a race cut the risk of upper respiratory tract infection more than threefold compared to placebo. This isn't locker-room folklore or brewery marketing — it's concrete data from the Munich Marathon, with measurements of interleukin-6, leukocyte counts, and actual illness tracking for two weeks after the race. In this article, we look at exactly what the study showed, what mechanism might explain it, and where scientific certainty ends and overinterpretation of a single, if solidly designed, experiment begins.

August 24, 2026

Walking After Meals: How Much Does It Really Lower the Post-Meal Blood Sugar Spike?

"Be active" is advice so general it barely tells you when exactly to move. A randomized clinical trial in people with type 2 diabetes found something far more specific: a short walk right after a meal lowers the post-meal glucose spike more effectively than a generic recommendation to "meet your daily activity target" without specifying timing. What's more, the effect wasn't the same across all meals — after dinner specifically, walking cut the glucose spike by roughly 22%, considerably more than after other meals of the day. This suggests that for blood sugar control, what matters isn't just how much you move over 24 hours, but precisely when you do it. In this article we break down these findings step by step and explain exactly which population they've been shown in.

August 24, 2026

Protein Before Sleep and Muscle Recovery — Does It Really Help Build Mass?

"Eat cottage cheese or take casein before bed so your muscles grow all night" — this is one of the more popular pieces of advice in strength-training circles, based on a real observation: protein consumed right before sleep really does raise the rate of overnight muscle protein synthesis. But the question is different: does this momentary, cellular-level effect translate into real, additional gains in strength and muscle mass after weeks of training? A 12-week randomized controlled trial tested this directly — and the result is more tempered than popular guides suggest.

August 25, 2026

Creatine and Kidney Health — Is Supplementation Safe?

“Creatine destroys your kidneys” is one of the most persistent supplement myths — repeated not only by online skeptics but sometimes by doctors who spot elevated creatinine in a patient's blood test. A fresh 2025 meta-analysis, covering 12 studies and 440 participants, lets us separate two things that are easily confused: a small, real rise in blood creatinine from actual damage to kidney function, as measured by GFR.

August 25, 2026

Pulmonary Rehabilitation and COPD — What Does the Cochrane Review Show?

Chronic obstructive pulmonary disease (COPD) traps patients in a vicious cycle: breathlessness on exertion discourages movement, avoiding movement deepens deconditioning, and deconditioning worsens breathlessness at ever-lower levels of effort. Pulmonary rehabilitation — a structured exercise program combined with education, not just "breathing exercises" — is one of the few interventions that genuinely breaks this mechanism. The largest Cochrane review on the topic covered 65 randomized trials and nearly 3,800 participants — we look at exactly what it found.

August 27, 2026

Exercise and Parkinson's Disease — What Does the Meta-Analysis Show?

Parkinson's disease is a progressive neurodegenerative condition that cannot be reversed or "cured" by exercise alone. Yet a meta-analysis of 18 randomized trials with 901 patients shows that regular aerobic physical activity, carried out alongside pharmacological treatment, is associated with a moderate, statistically significant improvement in motor function. We explain exactly what was measured, how large this effect is, and why exercise remains an addition to therapy — not a replacement for it.

August 27, 2026

Exercise and Depression — What Does the Cochrane Review Show?

"Exercise helps with depression" is one of those recommendations you hear everywhere — from the doctor's office to social media. A Cochrane review covering 39 studies and more than two thousand participants does confirm a moderate effect of exercise on depression. But that same review contains a second, far less frequently cited number: when the analysis was restricted to only the most methodologically rigorous studies, the effect nearly disappeared. This is one of the best available lessons in how to read meta-analyses critically — and why the quality of studies, not just their number, determines the strength of a conclusion.

August 27, 2026

Protein and Resistance Training vs. Sarcopenia — What Does the Research Review Show?

Sarcopenia — the progressive, age-related loss of muscle mass and strength — is often treated as an inevitable part of aging that little can be done about. A large umbrella review, covering 41 systematic reviews and roughly 4,475 primary studies, shows something else: a specific, quantifiable intervention (protein at 1.2 g/kg body weight per day or more combined with resistance training) alongside separate but related data on what actually reduces fall risk in older adults.

August 27, 2026

Exercise and Chronic Low Back Pain — What Does the Cochrane Review Show?

Chronic low back pain is one of the most common reasons for doctor visits and sick leave worldwide. For decades, the standard advice was rest — today, the largest available body of evidence, covering 249 clinical trials, shows the opposite: movement, not immobilization, is the approach backed by the strongest evidence. We check exactly what the 2021 Cochrane review found, how large the effect is, and for whom exercise isn't the first step.

August 27, 2026

Glucosamine and Temporomandibular Joint Pain: What a Trial Against Ibuprofen Found

Temporomandibular joint (TMJ) pain can accompany every bite, yawn, or conversation, and long-term use of nonsteroidal anti-inflammatory drugs like ibuprofen isn't a consequence-free solution. A small Iranian trial directly compared glucosamine sulfate with ibuprofen — with a surprisingly favorable result for the supplement, though broader systematic reviews call for tempering that enthusiasm.

September 2, 2026

Phosphatidylserine and Post-Exercise Cortisol: Does This Supplement Really Blunt Training Stress

Phosphatidylserine is often marketed to athletes and people training intensely as a way to "calm down" cortisol after a workout and speed up recovery. Behind this claim stands a specific double-blind, placebo-controlled crossover study — small, but methodologically solid. We take a close look at exactly what it showed, and what it didn't, before you decide on this fairly costly supplement.

September 2, 2026

Ashwagandha and Muscle Strength and Mass: What the Latest Meta-Analysis of 13 Trials Shows

Ashwagandha is today one of the most commonly supplemented adaptogens among people who train with weights, and supplement makers happily cite studies "proving" gains in strength and muscle mass. The latest, three-level meta-analysis pooling thirteen randomized trials gives a more measured answer: the overall effect is real, but specifically for muscle strength — what bodybuilders and strength trainees care about most — the evidence remains uncertain.

September 2, 2026

Electrolytes During Exercise — When Plain Water Isn't Enough

Drinking large amounts of plain water during long, intense exercise sounds like an obviously safe hydration strategy — yet a study of Boston Marathon runners found that for some of them, it led to a dangerous dilution of blood sodium. Here's a practical guide to when and how to replace electrolytes during exercise.

September 3, 2026

Supplements for Long-Distance Runners — What Actually Has Evidence Behind It

Store shelves and running influencers' profiles are groaning under supplements promising better long-distance performance, but the International Olympic Committee's official position points to only a handful of substances with solid evidence of effectiveness. Here's a guide to which ones actually matter for a long-distance runner, and which are marketing with no evidence behind them.

September 3, 2026

Strength Training for Women Over 40 — Where to Start

The decline in muscle mass, bone density, and metabolic rate after forty isn't a life sentence — it's largely reversible with strength training, even if you've never picked up a barbell before. This guide shows how to start safely, how much load you actually need, and what to avoid in the first few weeks.

September 3, 2026

How to Dose Caffeine to Match Your Body Weight and Tolerance

"Just have one coffee before your workout" ignores the fact that the same caffeine dose acts very differently in someone weighing 55 kg versus someone weighing 95 kg. Here's how to calculate a caffeine dose per kilogram of body weight, instead of guessing based on cup size.

September 3, 2026

Milk Thistle and Liver Health: What Does the Research Actually Show?

Milk thistle — or more precisely, the silymarin it contains — is one of the best-selling "liver" supplements in the world, marketed as natural protection against alcohol, medication, and fatty food. The evidence is far more mixed than the label suggests: silymarin lowers liver enzymes in meta-analyses of nonalcoholic fatty liver disease, yet in one of the best-designed trials on chronic hepatitis C, even high doses performed no better than placebo, and a Cochrane review found no confirmed effect on mortality in high-quality trials.

September 4, 2026

L-Carnitine and Fat Burning: Does the "Fat-to-Mitochondria Transporter" Actually Work?

L-carnitine has been sold for decades as a "fat burner" — a substance said to transport fat directly into mitochondria to be burned for energy. The biochemical mechanism is real, but a well-designed trial combining carnitine with aerobic training in women found no difference in fat loss versus placebo, while a meta-analysis of 37 trials shows only a modest, if repeatable, effect on body weight. We check what the data actually confirm versus what's just a logical but unproven marketing hypothesis.

September 4, 2026

HMB and Muscle Loss: When Does This Supplement Actually Make Sense?

HMB (β-hydroxy β-methylbutyrate), a leucine metabolite, is often marketed as a universal muscle-protecting supplement — for athletes building mass and seniors worried about sarcopenia alike. The research shows a clear split: in healthy, regularly training young adults the effect is negligible, while in strongly catabolic situations — immobilization, old age, illness — the evidence for muscle protection is considerably stronger. This distinction gets lost in most marketing material.

September 4, 2026

Celiac Disease vs. Non-Celiac Gluten Sensitivity: How Do They Differ and Get Diagnosed?

"Gluten intolerance" is a term that in practice covers two completely different phenomena: celiac disease — an autoimmune condition with a clear diagnostic test, which likely affects over a million undiagnosed people in the US — and non-celiac gluten sensitivity, whose existence as a reaction specifically to gluten was undermined by the same research team's own follow-up study. This is one of the rare cases in medicine where science openly corrected itself within two years.

September 4, 2026

Histamine Intolerance: Symptoms, Causes, and the Low-Histamine Diet in Practice

Headaches after red wine, hives after aged cheese, diarrhea after tomatoes — more and more people are linking such symptoms to "histamine intolerance." It's a real clinical phenomenon, tied to a deficiency in the gut enzyme that breaks down histamine, but it's also one of the most over-diagnosed and poorly defined conditions in modern nutrition. We check what research on the low-histamine diet and DAO supplementation actually shows, and where the evidence ends and the popular narrative begins.

September 4, 2026

Whey vs. Casein Protein: Which Should You Actually Choose?

Whey and casein come from the same milk, but have completely different digestion kinetics — one acts like a fast injection of amino acids, the other like a slow, multi-hour release. This isn't a question of which protein is "better" in some general sense, but which one fits a specific situation better: right after training, during a long gap between meals, or before bed. We check what the research on digestion speed, muscle protein synthesis, and satiety of both proteins actually shows.

September 4, 2026

Sodium Bicarbonate and Exercise Performance: Does Baking Soda Actually Work?

Sodium bicarbonate (plain baking soda) is one of the few ergogenic supplements backed by dozens of studies and a meta-analysis spanning nearly 60 papers. The mechanism — buffering the hydrogen ions produced during intense anaerobic exercise — is well understood, and the effect is real, though small and limited to a specific type of effort. The practical problem isn't efficacy but tolerance: the dose that works ergogenically causes noticeable gastrointestinal distress in many people. We check who it's worth it for and how to minimize the risk of side effects.

September 4, 2026

Iron-Deficiency Anemia: Symptoms, Diagnosis, and What Happens Before Anemia Appears

Iron-deficiency anemia is the most common cause of anemia worldwide, affecting, according to the latest global burden of disease estimates, hundreds of millions of women. The problem is that the symptoms — fatigue, breathlessness, poor concentration — are vague enough to easily blame on stress, lack of sleep, or "just the season." We explain how iron deficiency is actually diagnosed, why a blood count alone may not be enough, and what research shows about the reversibility of symptoms.

September 4, 2026

Beefsteak Fungus – How to Cook It? 5 Best Ways to Prepare This Unusual Mushroom

Beefsteak fungus doesn't resemble any other mushroom in the kitchen — not in looks, and not in how you cook it. Its tangy flavor and meaty, fibrous texture mean some classic mushroom recipes simply don't work for it, and some techniques that work beautifully with button mushrooms or porcini actually ruin the effect here. We've gathered five ways to prepare it that genuinely bring out its best qualities — along with the tools you need, common mistakes, and how to store the finished dish.

September 6, 2026

Beefsteak Fungus – Can You Eat It? Edibility, Taste, and How to Prepare It

The sight of a sliced beefsteak fungus can be off-putting — its red, 'bleeding' flesh looks more like raw meat than any other forest mushroom. The answer to the edibility question is simple: yes, you can eat it. Things get more interesting once you ask how it actually tastes, how that changes with the age of the fruiting body and the way it's prepared, and whether it's even worth trying raw.

September 6, 2026

Beefsteak Fungus in the Kitchen – What to Make With a Mushroom That Looks Like Bloody Meat?

Already have a few beefsteak fungus fruiting bodies in your basket and wondering exactly what to cook with them? This mushroom pairs well with other bold flavors — eggs, cheese, red wine, or roasted root vegetables. We've gathered dish ideas that genuinely play to its strengths — acidity and meaty texture — along with tips on what to pair it with, what to avoid, and what to do if you've foraged more than you can eat right away.

September 6, 2026

Beefsteak Fungus in Cream Sauce — Step-by-Step Recipe

Braising in a sauce is the most 'forgiving' way to cook beefsteak fungus — it tones down the mushroom's characteristic sourness and softens its fibrous texture, resulting in a dish that's approachable even for people unsure whether they'll like this unusual species. Below is a simple recipe for beefsteak fungus braised in a cream-and-herb sauce, step by step, along with notes on ingredients, common mistakes, and serving suggestions.

September 6, 2026

Beefsteak Fungus — Where Does It Grow, When to Look for It, and How to Identify It?

Beefsteak fungus doesn't grow just anywhere or at just any time of year — it's a species tied almost exclusively to one kind of tree and a narrow window in the calendar. That predictability, combined with a strikingly distinctive appearance, makes it one of the safer forest mushrooms to identify on your own — as long as you know what to look for, what gear to bring, and what to expect at each stage of the fruiting body's growth.

September 6, 2026

How to Increase Energy During the Day? 10 Science-Backed Ways

"Chronic fatigue" is one of the most common reasons people see a primary care doctor, and at the same time one of the worst-served topics in online guides — because alongside genuinely useful habits (sleep, movement, hydration), these guides regularly offer unverifiable promises of an "instant energy boost." We collected ten concrete ways to increase daytime energy that have real research behind them — including three that aren't a habit at all, but a signal to get a blood test before changing your lifestyle.

September 7, 2026

How to Improve Insulin Sensitivity? 10 Ways Backed by Research

Insulin resistance rarely gives clear symptoms before it progresses into prediabetes or type 2 diabetes — and the internet is full of advice like "drink apple cider vinegar and eat cinnamon and your blood sugar will sort itself out." Some of that advice has real, if modest, research support; other parts are single, overhyped findings. We gathered ten ways to improve insulin sensitivity with genuine scientific documentation, clearly separating what's strongly proven from what's still promising but preliminary.

September 7, 2026

How to Increase VO2 Max? 10 Evidence-Based Ways to Improve Your Fitness

VO2 max — the maximum amount of oxygen the body can take up during exercise — is one of the strongest, most consistent predictors of all-cause mortality among routinely measurable health markers. The internet is full of shortcuts on how to raise it: from the cult "zone 2 vs. HIIT" debate, through supplements of questionable value, to advice that confuses an acute physiological effect with a long-term adaptation. We gathered ten ways that actually have research backing — with an honest distinction between what's well documented and what's still preliminary.

September 7, 2026

How to Boost Your Metabolism? 10 Ways With Real Scientific Backing

"Boosting your metabolism" is one of the most overused phrases in the fitness and supplement industry — promised by everything from green tea to drinking cold water, often without mentioning how small most of these effects actually are. We checked ten strategies that genuinely have research support, honestly separating the ones with a real, if modest, effect on energy expenditure from the ones that are marginal at best.

September 7, 2026

How to Increase Strength After 40? 10 Ways Backed by Research

After 40, the loss of muscle mass and strength accelerates — a process called sarcopenia that, left unaddressed, progresses quietly for decades until it starts limiting everyday function. The good news: it's one of the few aging processes that can genuinely be reversed, not just slowed, if you reach for methods that are actually backed by research — not just another supplement from an ad.

September 7, 2026

How to Lose Belly Fat? 10 Ways Backed by Research

Let's start with something popular guides prefer to stay quiet about: you can't "spot-burn" fat from your belly with crunches alone or a special "love handle" diet. Physiology doesn't allow for it — the body mobilizes fat from across the whole body according to an individual, largely genetically determined pattern, not from wherever you happen to be exercising. The good news is that visceral fat — the type that accumulates around the internal organs of the abdominal cavity, the metabolically most harmful kind of fat tissue — responds to certain interventions more strongly than subcutaneous fat elsewhere on the body. This article collects 10 ways to reduce belly fat that have real, verified research backing — without promises of spot-burning fat from one specific place.

September 7, 2026

How to Reduce Appetite Naturally? 10 Ways That Actually Help Control Hunger

Hunger and appetite aren't a matter of "willpower" — they're a complex, hormonally driven system in which leptin and ghrelin, sleep, meal composition, and stress levels all interact to decide whether you'll reach for a second helping. Popular advice like "just eat less" ignores this physiology, which is exactly why it so often fails. This article gathers 10 ways to naturally reduce appetite that have real, verified support in experimental research — with a clear distinction between effects that are large and solid, and those that are real but modest in numbers.

September 7, 2026

Maca Root, Libido, and Energy

Maca (Lepidium meyenii) is a Peruvian root from the cabbage family, eaten in the Andes for centuries as food and sold in the West for the past decade as a natural "aphrodisiac" and energy booster. A handful of small but genuinely conducted clinical trials actually do show an improvement in sexual desire with maca supplementation — and, interestingly, without any change in testosterone levels, one of the more curious and less well-known findings in this field. The second part of the marketing promise — "energy" — is far less documented, with evidence that is, in practice, almost entirely anecdotal.

September 10, 2026

Ginseng for Fatigue and Cognitive Function

Ginseng is one of the longest-used adaptogens in the world, and its effect on fatigue and cognitive function has been tested in dozens of clinical trials — with results that resist a one-line summary. In cancer patients with chronic fatigue, the effect is often clear and repeatable; in healthy people with everyday mental tiredness, the evidence is far weaker and inconsistent. We check what the clinical trials actually showed, where the effect is most credible, and where supplement marketing outruns the science.

September 9, 2026

The Carnivore Diet: Facts and Myths — What Does the Research Actually Say?

The carnivore diet (animal products only, zero plants) is one of the most radical dietary trends of recent years — surrounded by both enthusiastic accounts of vanishing digestive complaints and warnings about severe fiber and vitamin deficiency. The largest study to date covered more than 2,000 people, but relies entirely on self-report, with no control group — something experts critical of the study consider a significant limitation. We check what's actually known, where the data ends and anecdote begins, and what real risks come with a diet that has no room for even a single vegetable.

September 10, 2026

OMAD (One Meal a Day) — Is It Safe?

OMAD (One Meal A Day) is the most extreme popular variant of intermittent fasting — the entire day's calories and nutrients squeezed into a single, usually one-hour window. Unlike gentler protocols like 16:8, OMAD comes with its own distinct set of risks that rarely make it into popular write-ups: a higher risk of gallstones, large blood-sugar swings after one enormous meal, real difficulty covering protein and micronutrient needs, and open questions about where discipline ends and a disordered-eating pattern begins. We check what the research actually shows.

September 9, 2026

SIBO — Small Intestinal Bacterial Overgrowth

SIBO (small intestinal bacterial overgrowth) is a condition in which bacteria that normally colonize the large intestine multiply excessively in the small intestine, where under normal conditions there are far fewer of them. The result is bloating, gas, abdominal pain, and diarrhea or constipation that's easy to mistake for irritable bowel syndrome — and indeed, research shows the two diagnoses overlap far more often than one might expect. The trouble is that the standard diagnostic tests for SIBO have real limitations, and the term itself is often used more broadly today than the evidence supports.

September 10, 2026

Helicobacter pylori: Symptoms, Diagnosis, and Treatment of Infection

Helicobacter pylori is a bacterium that colonizes the stomach of nearly half the world's population, in most cases without symptoms. The problem is that in some infected people it leads to chronic inflammation of the stomach lining, peptic ulcer disease, and, in rare cases, gastric cancer — and rising antibiotic resistance means standard treatment increasingly fails. We check how to recognize an infection, when treatment actually reduces gastric cancer risk, and when antibiotic therapy "just in case" misses the point.

September 10, 2026

Swimming as a Workout: What Are the Real Health Benefits?

Swimming is sometimes called the most complete form of physical activity — it engages nearly every muscle group, is gentle on the joints, and doesn't require high fitness to get started. One of the largest cohort studies in this field even suggests that swimmers have significantly lower all-cause mortality than runners, walkers, or sedentary people. We check what research actually confirms about swimming — for the cardiovascular system, joints, and mental health — and where the swimming community's enthusiasm runs ahead of the available evidence, particularly on bone density.

September 10, 2026

Mobility and Flexibility Training: Why Should You Add It to Your Workout Plan?

Mobility is often treated as an add-on to "real" training — something you do in the last five minutes of a session, if there's even time for it. Yet joint range of motion is one of those fitness parameters that deteriorates fastest without deliberate work on it, and its loss has real consequences: from worse resistance-training technique, through higher risk of overuse injury, to — in older adults — a documented link to falls. We check exactly what research says about mobility training, how it differs from ordinary stretching, and when stretching can actually do harm.

September 10, 2026

10,000 Steps a Day — Myth or Proven Number?

The figure of 10,000 steps a day sounds like a research finding — round, specific, repeated by fitness apps and doctors alike. In reality it comes from a Japanese pedometer maker's 1965 marketing campaign, not from any clinical study. Only decades later did science actually examine how many daily steps are genuinely associated with lower mortality — and the answer is more nuanced, and for many people far more achievable, than the round number from a pedometer ad suggests.

September 9, 2026

Plantar Fasciitis — Causes, Risk Factors, and What Actually Helps

A stabbing, burning heel pain with the first steps after getting out of bed is one of the most recognizable symptoms in orthopedics — and one of the most common causes of foot pain in adults. Plantar fasciitis is often mistakenly reduced to a "heel spur" and treated with methods of questionable effectiveness, while the evidence points to a much simpler, cheaper first-choice intervention. We check what actually raises the risk of this condition, which treatment methods have real support in research, and why popular steroid injections carry a risk that's rarely discussed openly.

September 10, 2026

Frozen Shoulder — Symptoms, Causes, and What Effective Rehabilitation Looks Like

Frozen shoulder (adhesive capsulitis) can develop over months, starting with unremarkable pain and ending in a dramatic loss of shoulder mobility that makes even getting dressed or reaching for a wallet in a back pocket difficult. The popular belief that the problem will "go away on its own" within a year is, in light of newer research, an oversimplification — and the choice between physical therapy, a steroid injection, and an invasive procedure can be less obvious than popular guides suggest. We check what actually raises the risk of frozen shoulder, why it's so strongly linked to diabetes and thyroid disease, and which treatment methods have real support in research.

September 10, 2026

Halitosis — What Actually Causes Bad Breath

Bad breath is usually blamed on poor hygiene — but in the vast majority of cases, it isn't about brushing too rarely. Systematic reviews show that in 85-90% of cases the source of the problem sits in the mouth itself, and the single most common cause is bacterial coating on the back of the tongue, not gum disease or a bad diet. We check what's actually known about the causes of halitosis, how it's really diagnosed in clinical settings, and which interventions — tongue scraping, specific mouthwashes, probiotics — have real support in clinical trials, and which are mostly a promise printed on the packaging.

September 10, 2026

Black Seed — Nigella Sativa Oil and Its Properties

Black seed oil (Nigella sativa) is often marketed as a near cure-all — from immune support to fighting cancer. The reality is more restrained, though far from empty: several independent meta-analyses of randomized controlled trials show a real, if modest, effect on glycemic control in type 2 diabetes, lipid profile, and blood pressure. We check which claims are backed by clinical studies in humans and which remain at the test-tube or animal-model stage.

September 10, 2026

Sciatica: Causes and Evidence-Based Treatment

Sciatica — a burning pain that radiates from the lower back down the leg along the path of the sciatic nerve — is one of the most common reasons people see a doctor, and one of the most frequently mismanaged pain conditions. For decades the standard advice was bed rest; today we know that approach doesn't just fail to help, it can actively hurt recovery. We check what the research actually shows about disc herniation, piriformis syndrome, anti-inflammatory drugs, and surgery — and which symptoms mean sciatica has stopped being a home-care issue and become a medical emergency.

September 13, 2026

Carpal Tunnel Syndrome: Causes and Evidence-Based Treatment

Numbness, tingling, and pain in the thumb, index, and middle finger that worsen at night — that's the classic picture of carpal tunnel syndrome, one of the most common compression neuropathies. We check what actually causes this condition, why obesity and hypothyroidism raise the risk more than you might expect, and what a randomized trial comparing wrist splinting with surgery actually found — including when a nerve conduction study is genuinely needed and when a clinical diagnosis is enough.

September 13, 2026

Pregnancy Nutrition: What to Eat and What to Avoid

"Eating for two" is one of the most misleading phrases in pregnancy nutrition — actual calorie needs rise far less than the saying implies, while the need for specific nutrients rises considerably. Folate, iron, iodine, choline, and DHA have documented effects on a baby's development, and a handful of specific food categories — raw fish, unpasteurized cheese, high-mercury fish, alcohol — carry real, well-documented risk. We check what ACOG, FDA/EPA guidance, and specific clinical studies actually say.

September 16, 2026

Ulcerative Colitis: Symptoms, Diagnosis, and Treatment Step by Step

Ulcerative colitis (UC) is a chronic inflammatory bowel disease in which the immune system attacks the lining of the colon. The disease runs in cycles of flares and remission, and its diagnosis and treatment follow a clearly defined therapeutic ladder — from mesalamine, through steroids during flares, to biologic drugs. We explain what that path looks like in practice, how diagnosis works, and when symptoms should prompt urgent medical attention.

September 16, 2026

Crohn's Disease: Symptoms, Complications, and Treatment Step by Step

Crohn's disease is a chronic inflammatory bowel disease that — unlike ulcerative colitis — can affect any part of the digestive tract, from mouth to anus, and attacks the full thickness of the bowel wall. That's exactly what drives the complications typical of Crohn's: strictures, fistulas, and abscesses, all rare in ulcerative colitis. We explain how to tell the two diseases apart, how diagnosis works, and how the modern treatment ladder is built.

September 16, 2026

Tennis Elbow: Causes and Treatment — Why Rest Alone Isn't Enough

Tennis elbow (lateral epicondylitis) rarely has anything to do with tennis — it most often affects people doing physical work, heavy computer-mouse users, or strength trainers. It isn't classic "inflammation" but a chronic, degenerative change in the tendon that responds poorly to rest alone and, surprisingly, poorly to steroid injections over the long run. We look at what the evidence actually shows about eccentric exercise, braces, and injections.

September 16, 2026

Anterior Cruciate Ligament (ACL) Tear: Injury and Rehabilitation

For years, a torn anterior cruciate ligament (ACL) was treated as an injury that almost automatically called for surgery. The randomized KANON trial, following patients for 5 years, challenged that assumption: some people do just as well with rehabilitation alone, with delayed surgery available only if needed. We look at what the data actually show about choosing between surgical and conservative treatment, the phases of rehabilitation, and a safe return to sport.

September 16, 2026

Shin Splints (Medial Tibial Stress Syndrome): Causes and Prevention

Shin splints, known in the medical literature as medial tibial stress syndrome (MTSS), are one of the most common overuse injuries among runners and military recruits. Pain along the inner edge of the shin is often mistaken for a stress fracture — and the distinction matters clinically, because a wrong diagnosis means the wrong treatment. We look at what the research says about risk factors, prevention, and when shin pain is something more serious than overuse.

September 16, 2026

Gout: Causes and Treatment

Gout is the most common inflammatory joint disease in adult men — and a disease whose treatment still runs into the same mistakes: treating only the acute flare without addressing the underlying cause, doses of urate-lowering drugs that are too low or titrated too slowly, and stopping therapy prematurely once the pain resolves. We look at what the American College of Rheumatology guidelines and major clinical trials actually show about treating a flare and long-term therapy.

September 16, 2026

Micronutrient Deficiencies: The Most Common Symptoms — A Practical Guide to Five Usual Suspects

Chronic fatigue, trouble concentrating, muscle cramps, or hair loss have dozens of possible causes — but five micronutrient deficiencies account for a surprisingly large share of such symptoms in the general population. This article is a practical guide to which deficiency is worth suspecting given which symptoms — not so you can diagnose yourself, but so you know exactly what to ask your doctor and which blood test to request first.

September 16, 2026

Kidney Stones: Symptoms and Treatment — From Renal Colic to Surgery

Kidney stones affect nearly 1 in 11 people over a lifetime, and anyone who's already had one episode faces a notably elevated risk of another. We explain how to recognize renal colic, how the different stone types differ, when it's reasonable to just wait for a stone to pass on its own, and when lithotripsy or an endoscopic procedure becomes necessary.

September 21, 2026

Liver Cirrhosis: Causes, Symptoms, and Stages of the Disease

Liver cirrhosis is the end stage of many different chronic liver diseases — not just alcohol misuse, though that association still dominates public perception. We explain the real causes of cirrhosis, why the distinction between compensated and decompensated disease is fundamental to prognosis, and which symptoms should prompt urgent medical attention.

September 21, 2026

Shingles: Symptoms and Treatment — Why Timing Matters

Shingles is a reactivation of the very same virus that gave us chickenpox, often decades earlier. Although most people get through it without serious complications, in some patients — especially older ones — a chronic, hard-to-treat nerve pain develops that can persist for months after the rash clears. We explain the mechanism of reactivation, why the first 72 hours from the appearance of the rash matter so much for treatment, and what large trials show about vaccine effectiveness.

September 21, 2026

Lyme Disease (Borreliosis): Symptoms, Stages, and Treatment

Lyme disease, transmitted by the bite of an infected tick, is the most common tick-borne illness in Europe and North America. In its early stage it's usually easy to recognize and cure effectively with antibiotics — the problem starts when the characteristic rash is missed and the disease progresses to later stages. We explain the course of the infection step by step, standard treatment according to current guidelines, and — with the skepticism that intellectual honesty demands — the controversy around so-called "chronic Lyme disease."

September 21, 2026

Stress Fractures: Causes, Risk Groups, and Prevention

A stress fracture isn't the same problem as shin splints, even though both sit on the same overuse continuum — a stress fracture is its more advanced, more serious point, it can affect many bones (not just the tibia), and it calls for different management. We look at what actually raises stress-fracture risk, why energy deficiency (RED-S) is one of the best-documented risk factors in athletes, which bones warrant more concern than others, and what a safe return to activity looks like.

September 21, 2026

Bone Fracture Healing: What Actually Speeds It Up, and What's Just Marketing

After a fracture, the natural instinct is to look for ways to speed up healing — and the market is happy to respond with supplements, devices, and advice of wildly varying credibility. We look at how bone healing actually progresses through its biological phases, what the evidence says about calcium, vitamin D, and protein supplementation, why ultrasound bone stimulators have a narrower use case than the ads suggest, and why smoking has one of the best-documented, genuinely harmful effects on bone union.

September 21, 2026

Sedentary Lifestyle: What Are the Real Health Consequences?

A daily workout after work is often treated as a free pass to sit for the rest of the day. Yet large meta-analyses show that long sitting time is linked to elevated risk of chronic disease and death regardless of how much you exercise — a phenomenon known as the "active couch potato." We explain the mechanism, the risk data, and practical, evidence-based ways to break up prolonged sitting.

September 22, 2026

Can Diet Affect Acne and Libido at the Same Time?

Acne after your twenties and a drop in libido look like two completely unrelated problems — yet what you eat can genuinely affect both at once. We explain why a diet high in refined sugar and dairy is linked to more frequent acne, how that same insulin mechanism touches SHBG and testosterone availability, and where solid science ends and internet oversimplification begins.

September 25, 2026

Can vitamin deficiencies affect libido and skin?

Zinc, vitamin D, B12, and iron show up on nearly every online list of 'supplements for testosterone and skin.' Some of these connections rest on solid science, others are a stretch. We check which deficiencies actually affect libido and skin condition, how large that effect really is, and when supplementation makes sense versus when it's a waste of money.

September 25, 2026

Gym Training, Testosterone, and Acne — Where Facts End and Myths Begin

"I started training and broke out with acne on my back, it must be from testosterone" is one of the most common misdiagnoses in the gym. We check how much resistance training actually raises testosterone, how long it lasts, and what's really behind acne in people who work out.

September 25, 2026

Can Creatine Raise Creatinine Even With Healthy Kidneys?

Creatine supplementation almost always raises your blood creatinine result — that's a fact confirmed across dozens of studies. The question is whether that means a kidney problem or just an artifact of how eGFR is calculated. We answer directly and show how much the result really rises.

September 27, 2026

Do You Need to Stop Creatine Before a Creatinine Test?

Usually you don't need to stop creatine before a routine blood test. We explain when a break actually makes sense, how long it should last, and why skipping one day barely changes anything.

September 27, 2026

Can Eating Meat Before a Test Raise Creatinine?

A large cooked-meat meal can raise blood creatinine much more than most people expect — a classic study found an increase of nearly half. We explain the mechanism and how many hours you should wait before a test.

September 27, 2026

Can Dehydration Raise Creatinine Even With Healthy Kidneys?

Dehydration can transiently raise a creatinine result even in someone with healthy kidneys — through two overlapping mechanisms: blood concentration and reduced kidney blood flow. We explain when this actually matters and when it doesn't.

September 27, 2026

Can Leg Training Raise AST More Than ALT?

Heavy leg training can raise AST noticeably more than ALT — and that's not a coincidence. AST is abundant in skeletal muscle; ALT is far more liver-specific. We explain the mechanism and how to tell this apart from a real liver problem.

September 27, 2026

Can Heavy Training Raise ALT Without Liver Disease?

Yes, very intense, unaccustomed training can raise ALT to values that look like real liver disease — even though the liver is completely healthy. We explain why this happens, who is most affected, and how to tell it apart.

September 27, 2026

Can DOMS Cause Very High CK?

Muscle soreness can come with creatine kinase (CK) elevated dozens of times over — into the thousands, sometimes tens of thousands of U/L. We explain the mechanism, real numbers from studies, who reacts more strongly, and where the line sits between a normal training response and rhabdomyolysis.

September 27, 2026

L-Theanine and Caffeine: Synergy and Dosage

Unlike most topics in this series, combining L-theanine and caffeine isn't a dangerous interaction — it's a synergy, and one of the better-documented ones in the world of nootropic supplements. Several randomized studies show that L-theanine smooths out caffeine's stimulant profile, reducing the typical jitteriness and racing heart, while the combination improves performance on attention-demanding tasks more than either component alone. This is a rare case where "the effect together is greater than the sum of its parts" has real, repeatable backing in the literature.

September 30, 2026

Ginseng and Diabetes Medication: Hypoglycemia Risk

American and Asian ginseng are marketed as natural support for glycemic control — and indeed, clinical trials confirm they genuinely lower post-meal blood sugar. The problem is that this effect doesn't stop in the presence of a diabetes drug — it adds to it. In patients taking sulfonylureas or insulin, that sum can mean hypoglycemia that isn't the result of a dosing error, but of undisclosed supplementation.

October 3, 2026

Low Potassium Despite a Normal Diet: Possible Causes

A blood test shows low potassium, even though your diet looks completely normal — no restrictions, no crash dieting, regular meals. This is a common but poorly understood scenario, because a true potassium deficit in the body rarely comes from inadequate dietary intake. Far more often it's about increased potassium loss — through the gut, the kidneys, diuretic medications, or, something many people overlook, regular licorice consumption. We explain the mechanisms and what's worth checking.

October 3, 2026

High Uric Acid Without Gout: Should You Worry?

A blood test comes back with elevated uric acid, but there's never been a gout attack — no painful, swollen toe, no joint on fire. This is a very common situation, called asymptomatic hyperuricemia, and it raises a fair question: is this something that needs treating, or just a number you can ignore? The answer is more nuanced than either extreme.

October 3, 2026

Muscle Soreness (DOMS) and Training the Next Day: Should You Train Through the Pain?

Delayed onset muscle soreness (DOMS) raises one of the most common gym dilemmas: keep training, or wait it out? The answer depends on whether the planned session targets the same muscle group that hasn't recovered yet, and on how severe the soreness actually is — and evidence on the so-called repeated bout effect shows that moderate soreness itself isn't a reason to stop, even though training a sore muscle group at maximum effort does come with a real cost in reduced force output.

October 3, 2026

Static vs. Dynamic Warm-Up: What Research Says About Strength and Injury Risk

Static stretching performed right before strength training or a sprint can measurably reduce the force and power you produce — one of the best-documented, yet still widely ignored, findings in exercise physiology. Dynamic, movement-based warm-up doesn't carry this cost, and in many studies actually improves performance. That doesn't make static stretching worthless — it just has a different place in your session than right before a maximal effort.

October 3, 2026

Fasted Training and Muscle Loss: Myths and Facts

The fear that fasted strength training speeds up muscle breakdown, because the body “has nothing else to burn” besides muscle tissue, is one of the most persistent fitness myths — and, as the newest randomized clinical trial comparing 12 weeks of fasted versus fed training shows, an untrue one. That doesn't mean meal timing relative to training is completely irrelevant — only that total daily protein and energy intake is what decides the outcome, not the training time window itself.

October 3, 2026

Blood Flow Restriction (BFR) Training and Muscle Growth at Low Loads

Blood flow restriction (BFR) training involves partially, deliberately restricting blood flow in a limb with a pressure cuff while exercising at a very low load — usually 20-30% of your one-repetition maximum. It sounds like a contradiction: how can training with a light dumbbell build muscle comparably to classic heavy-load strength training? The answer lies in a specific metabolic environment created inside the muscle when venous outflow is restricted — and recent meta-analyses show the hypertrophic effect is real, and in many conditions close to that of heavy-load training.

October 3, 2026

Caffeine and Insulin Sensitivity: The Short-Term Effect on Blood Sugar

One of the more surprising paradoxes in nutrition science: regular coffee drinking is linked in population studies to lower type 2 diabetes risk, while a single dose of caffeine taken before a meal acutely raises post-meal blood glucose and lowers insulin sensitivity. Both observations are true — and they aren't contradictory once you understand the difference between caffeine's acute effect alone and the long-term, complex effect of coffee as a whole beverage.

October 3, 2026

Almond Mushroom (Agaricus blazei)

A mushroom from the Brazilian forests studied mainly for immune modulation and blood-sugar support — human evidence is mixed and preliminary, despite the supplement's considerable popularity.

Cauliflower Mushroom (Sparassis crispa)

A rare, prized forest mushroom with one of the highest documented beta-glucan contents — in Poland it's mainly foraged for the table, while Japanese research into its effects on immunity and blood sugar rests almost entirely on animal models.

Hon-shimeji (Lyophyllum shimeji)

A wild-growing, mycorrhizal 'true shimeji' from Japan and Scandinavian pine forests — genetically and ecologically distinct from the cultivated bunashimeji sold under the same name.

Shaggy Bracket (Inonotus hispidus)

A rare, striking orange-rust bracket fungus in Poland, parasitizing mainly apple and ash trees; a relative of chaga with limited, mostly Chinese, in vitro research into anticancer and antioxidant compounds.

Ochre Bracket (Trametes ochracea)

A species nearly identical to turkey tail, often mistaken for it in the field. It has a single laboratory study on a fruiting-body extract behind it — no clinical trials whatsoever.

Grifola sordulenta

A Patagonian 'sister' species to Grifola gargal, growing on koihue and prized locally for its culinary qualities — but, unlike gargal, with practically no research in humans or animals at all.

HbA1c (Glycated Hemoglobin)

A biomarker reflecting average blood glucose over the past 2–3 months — the gold standard for diagnosing and monitoring diabetes, far more stable than a single glucose measurement.

What is biohacking

From the DIY-biology movement through the Quantified Self to today's social-media-popular trend — what biohacking actually is in practice, and where science ends and marketing begins.

Zinc

A trace element essential for the work of over 300 enzymes in the body — its deficiency, more common than widely believed, affects immunity, wound healing, and hormone balance.

Chronotype

An individual, largely genetically determined preference for sleep and activity timing — ignoring it leads to a phenomenon known as 'social jet lag,' linked to worse metabolic health.

SHBG (Sex Hormone-Binding Globulin)

A transport protein whose level determines how much testosterone is actually 'available' to tissues — without knowing SHBG, a total testosterone result alone can be misleading.

PSA and Prostate Health

Prostate-specific antigen is one of the most commonly ordered tests in men over 50 — but also one of the most controversial, due to a high false-positive rate.

Sleep and Memory

Learning during the day is only half of the memorization process — the other half happens at night, as the brain actively consolidates and organizes newly acquired information during sleep.

Growth Hormone (GH)

A peptide hormone responsible for growth in childhood and tissue regeneration throughout life — surrounded by a dense web of marketing myths about supplements supposedly 'releasing GH.'

Telomeres and Telomerase

Protective 'caps' on the ends of chromosomes that shorten with every cell division — one of the most recognizable, though still imperfect, biomarkers of cellular aging.

hCG as Adjunct Therapy in TRT

Human chorionic gonadotropin is sometimes added to testosterone replacement therapy specifically to prevent testicular atrophy and preserve fertility — a problem exogenous testosterone alone doesn't solve.

Male Fertility and Semen Quality

A widely cited 2017 meta-analysis showed a decades-long decline in sperm counts in Western countries — we look at what's actually known about the factors affecting male fertility.

NEAT (Non-Exercise Activity Thermogenesis)

All the energy burned on everyday movement unrelated to formal exercise — fidgeting, standing, gesturing — can differ by as much as 2000 calories a day between individuals, despite no difference in the number of planned workouts.

OTC Sleep Aids — Overview and Comparison

Melatonin, valerian, diphenhydramine, magnesium, glycine, L-theanine — the six most popular over-the-counter sleep aids work on completely different principles and have completely different levels of evidence behind them. Choosing the right one depends on exactly which sleep problem you're trying to solve, not on which product has the loudest marketing.

Exercise Stress Test

An exercise stress test monitors the heart's electrical activity, blood pressure, and symptoms during gradually increasing physical exertion on a treadmill or stationary bike, revealing heart muscle ischemia that remains invisible on a resting ECG.

Oral Glucose Tolerance Test (OGTT)

The oral glucose tolerance test (OGTT) is a functional test assessing how the body handles a standardized dose of glucose over time — from a fasting measurement, through drinking a 75 g glucose solution, to serial blood draws over the following hours. Unlike a single fasting glucose measurement or HbA1c, it reveals early, dynamic disturbances in glucose tolerance.

Can insulin resistance occur in a lean man?

Yes — insulin resistance can affect men with a normal BMI too, if fat accumulates mainly viscerally and inside internal organs rather than under the skin. We explain the TOFI phenomenon (thin-outside-fat-inside) and why BMI alone isn't enough to assess metabolic risk.

Can insulin resistance occur without being overweight?

Yes — insulin resistance can occur even in people with no excess body fat at all, including visceral fat. We explain the rarer, but real, mechanisms that operate independently of fat: genetic variants in the insulin signaling pathway, chronic sleep deprivation, chronic stress, and physical inactivity.