Redakcja VitMode — Sen i neurobiologia

Noopept

A nootropic dipeptide with a reputation in the biohacking community as a 'stronger piracetam' — in reality a substance registered as a drug only in Russia and the CIS, with an evidence base built almost entirely on animal and in-vitro studies, and very thin, low-confidence human data.

Phenylpiracetam

A piracetam derivative from the racetam family, registered as a drug only in Russia under the name Phenotropil — and, at the same time, a substance listed on WADA's prohibited list for doping. That second fact, not enthusiastic 'super-nootropic' write-ups, should be the first thing read by any athlete or biohacker considering it.

Methylene Blue

A synthetic dye used in medicine for over 140 years that has found a second life in biohacking as a compound said to support mitochondrial function and cognition — but the same mechanism that makes it interesting is also behind one of the most underappreciated, potentially fatal over-the-counter drug interactions.

PEMF — Pulsed Electromagnetic Field Therapy

Pulsed electromagnetic field therapy is one of the rare cases in biohacking where the exact same technology name hides two completely different stories: a narrow, genuinely FDA-cleared medical use for bone healing, and a much broader, far less supported general wellness promise sold through mats and devices for home use.

Grounding (Earthing)

Walking barefoot on grass, grounding mats and sheets plugged into a wall outlet's ground pin, the promise of neutralizing "free radicals" via electrons flowing in from the earth — grounding is one of those biohacking practices where social-media popularity has clearly outrun the quality of the underlying science.

Nicotine as a Nootropic

Nicotine outside of cigarettes — gum, lozenges or patches used purely to sharpen focus, with no tobacco combustion — has real, clinically documented effects on attention and processing speed. It's also one of the most two-sided topics in biohacking: the same compound that measurably sharpens attention is also one of the most addictive over-the-counter psychoactive substances available.

Tremella (Snow Fungus)

A jelly-like mushroom trendy in cosmetics as a 'vegan alternative to hyaluronic acid' — real clinical trials in humans, however, mostly involve oral supplementation and endpoints other than skin hydration.

Red-Belted Conk (Fomitopsis pinicola)

A common perennial bracket fungus on conifers in Polish forests — the subject of laboratory research into triterpenes, but with no supplement market or human clinical studies.

Sleep Stages — NREM and REM Architecture

Sleep isn't a uniform state — it's an orderly sequence of physiologically distinct stages, NREM (stages N1, N2, N3) and REM, repeating in roughly 90-120 minute cycles, each serving a different, partly overlapping function in physical restoration, memory consolidation, and emotional processing.

Sleep Hygiene — Principles

Sleep hygiene is a set of behaviors and environmental conditions — from consistent bedtimes to bedroom temperature — believed to support healthy sleep, but contrary to popular belief, the evidence for the effectiveness of individual recommendations, taken alone, is more limited and mixed than usually assumed.

Jet Lag — Mechanism and Prevention

Jet lag isn't post-flight tiredness — it's a genuine mismatch between two clocks: the internal biological clock run by the suprachiasmatic nucleus in the brain, and the external clock imposed by a new time zone after rapidly crossing several meridians. Because the body can only shift by about an hour a day, while a flight can move you across several zones in a few hours, a window of several days opens in which sleep, digestion, alertness and mood run on a different schedule than your watch — and that window can genuinely be shortened once you understand the mechanism and which interventions actually affect it.

Delayed Sleep Phase Syndrome (DSPS)

DSPS is a circadian rhythm disorder in which the internal biological clock is persistently shifted several hours relative to the socially expected sleep time — a person with the syndrome doesn't have insomnia in the classic sense, just normal-quality sleep occurring at the wrong time.

Excessive Daytime Sleepiness

Excessive daytime sleepiness (EDS) isn't a disease in itself — it's a symptom. Behind a persistent difficulty staying alert during the day can lie more than a dozen different causes, from ordinary sleep deprivation to sleep apnea, medications, or — far more rarely — narcolepsy.

Sleep Deprivation

Sleep deprivation — whether acute and total, or chronic and partial — produces measurable, research-documented changes in cognitive function, metabolism, immune function, and the cardiovascular system, often before we even subjectively feel very sleepy.

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.

Bedroom Temperature and Sleep Quality

Before your brain will let you fall asleep, your body temperature has to drop — and if the bedroom is too warm, that signal simply doesn't get through. A bedroom that's too hot or too cold fragments sleep more effectively than many other environmental factors, yet it remains one of the most neglected elements of sleep hygiene.

Polysomnography (Sleep Study)

Polysomnography (PSG) is a comprehensive test that simultaneously records brain activity, eye movements, muscle tone, airflow, respiratory effort, blood oxygen saturation, and heart rhythm throughout a full night's sleep — the gold standard for diagnosing breathing disorders and assessing sleep architecture.

High-Protein Diet

Increased protein intake is one of the best-documented ways to maintain satiety during weight loss and protect muscle mass — with no magic macronutrient ratios required.

Leptin and Ghrelin

Two opposing hormones that regulate hunger and satiety — understanding how they work explains why losing weight is physiologically harder than a simple calorie-balance model suggests.

Low-FODMAP Diet

A three-phase elimination protocol developed specifically for people with irritable bowel syndrome — one of the few 'therapeutic' diets with solid support from randomized clinical trials.

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.

Downy Bracket (Trametes pubescens)

A rarer relative of turkey tail, listed on Poland's red list of threatened fungi. It has a handful of laboratory studies and one animal study on a fruiting-body extract behind it, but zero clinical trials in humans.

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.

Tinder Fungus (Fomes fomentarius)

A legendary bracket fungus and Ötzi's companion — for millennia the primary raw material for fire-starting in Europe, today mostly a historical and ethnobotanical topic rather than a dietary supplement.

Hand Tremor: Causes (Physiological, Essential, Drugs, Thyroid) and When to See a Neurologist

Shaky hands are usually not the start of Parkinson's disease. More often they reflect an enhanced physiological tremor (coffee, stress, lack of sleep, medicines, an overactive thyroid) or essential tremor, the most common action tremor in adults. What decides the diagnosis is not the tremor itself but its pattern: whether it appears at rest or during movement and posture, which side is worse, and whether other symptoms come with it. We explain how to tell these types apart, what the guidelines say about propranolol and primidone, and when to book a neurologist.

November 3, 2026

Muscle Twitching (Fasciculations): Causes, When It Is Harmless and When to Get Tested

Muscle twitching on its own, without weakness or wasting, is benign in the vast majority of cases. In a classic study of 121 people with benign fasciculations followed for 2 to 32 years, none developed motor neuron disease. What should worry you is not the twitch itself but what comes with it: progressive weakness, visible muscle wasting, trouble speaking or swallowing. We explain where fasciculations come from, what makes them worse (caffeine, exercise, stress, lack of sleep), what is really known about magnesium, what role EMG plays and when to see a neurologist.

November 3, 2026

Tingling and Numb Feet: Causes and Which Tests to Have

Tingling and numbness in the feet have a dozen or so possible causes, and the pattern of symptoms often suggests where to start. Tingling in both feet that starts in the toes and creeps upward (a 'stocking' pattern) is most often polyneuropathy: diabetic or prediabetic, from vitamin B12 deficiency, alcohol or drugs. Tingling in one foot, in a strip of skin or on one side of the sole, is often a pinched nerve root or tarsal tunnel syndrome. Neurology guidelines name the highest-yield tests as glucose, vitamin B12 with metabolic markers and serum protein electrophoresis with immunofixation. We explain the differential, the order of tests and the warning signs.

November 3, 2026

Raynaud's Phenomenon: Cold, Whitening Fingers, Causes and Treatment

Raynaud's phenomenon is an episodic spasm of the finger vessels triggered by cold or stress: the fingers go white, then blue, then red. Most often it is primary, benign and affects young women, but it can also be the first sign of a systemic disease such as scleroderma or lupus. The key question is therefore not 'do I have cold fingers' but 'is it the primary or the secondary form'. We explain how to tell them apart (nailfold capillaroscopy, antibodies), what the Cochrane review says about calcium channel blockers, how to reduce attacks without drugs and when to see a doctor.

November 3, 2026

Numb Face and Tongue: Causes and When It Is an Emergency

Numbness of the face or tongue can be a dangerous symptom, but much more often it is harmless. The line is drawn by timing and accompanying symptoms: sudden numbness of one half of the face or tongue, especially with a drooping corner of the mouth, arm weakness, or problems with speech, vision or balance, is a reason to call emergency services (112 in the EU) even if the symptoms pass within minutes, because it may be a transient ischaemic attack (TIA). Gradual onset with migraine, numbness around the mouth after anxiety and fast breathing, numbness after dental treatment, or tingling after a raw fruit in an allergic person usually has a different background. We explain how to tell these situations apart.

November 3, 2026

Sleepy After Eating: Why You Feel Tired After Lunch

The heavy-eyelid afternoon after lunch is one of the most common adult experiences, yet the science explains it less obviously than popular wisdom about 'sugar' and 'carbs' suggests. Studies of meals of different composition and size show that the afternoon dip in alertness is largely a circadian phenomenon, and lunch mostly deepens it, especially after a short night. We explain what is actually known, how much blame belongs to glucose swings, when sleepiness after a meal can signal sleep apnoea or disturbed carbohydrate metabolism, and which simple changes make sense.

November 3, 2026

Brain Fog: Common Causes and Which Tests to Do

Brain fog is not a diagnosis but an everyday name for a cluster of symptoms: trouble concentrating, slower thinking, losing words and a feeling of 'cotton wool in the head'. Behind it most often lie lack of sleep, low mood, stress, deficiencies or hormonal disturbances, medicines, or a past viral infection, and less often a neurological disease. We present what research says about each cause (including meta-analyses on sleep loss, depression and long COVID), what a reasonable stepwise work-up looks like, and which symptoms need prompt consultation.

November 3, 2026

Excessive Tiredness After Exercise: Overreaching, Deficiency or Illness

Tiredness after exercise is normal and is sometimes the goal of planned loading, but when it does not pass despite rest, performance drops and mood worsens, a cause has to be sought. The ECSS and ACSM consensus describes a path from short-term, functional overreaching to overtraining syndrome, and the diagnosis rests mainly on exclusion: of energy and carbohydrate deficits, iron deficiency, infection and organic disease. We explain how to tell healthy tiredness from a problem, what research says about iron, low energy availability (RED-S) and recovery, and which symptoms, such as dark urine, need urgent help.

November 3, 2026

Always Feeling Cold (Cold Intolerance): Causes and Tests

Feeling cold when others are warm is often just a personal trait, but a persistent, new or worsening sense of cold can point to an underactive thyroid, iron deficiency and anaemia, too low a body weight or energy deficit, and sometimes circulation problems. Cold intolerance is a non-specific symptom, so the diagnosis rests on tests, not on the sensation alone. We present what research says about the thyroid, iron, energy deficit and differences between women and men, which tests are worth ordering and when the symptom needs prompt consultation.

November 3, 2026

Excessive Thirst (Polydipsia): Causes and When to Test Glucose

Constant, excessive thirst, often with passing large amounts of urine, has several well-described causes: diabetes, diabetes insipidus (now called vasopressin deficiency or resistance), primary polydipsia, hypercalcaemia and medicines, including lithium. Differentiation starts with simple blood and urine tests: glucose, HbA1c, sodium, calcium and creatinine. We explain how polydipsia differs from a dry mouth, what research says about each cause, which tests to do first and which symptoms, such as rapid weight loss, vomiting or confusion, need urgent help.

November 3, 2026

Tension Headache: Symptoms, Causes and What Helps (Medication, Habits, Exercise)

Tension-type headache is the most common type of headache: on both sides of the head, dull, pressing, usually without nausea and not made worse by walking. The best-documented acute drugs (ibuprofen 400 mg, paracetamol 1000 mg) help in a real but modest way — in Cochrane reviews only about one patient in 14 to 22 more than with placebo is pain-free at 2 hours. For prevention of the chronic form, amitriptyline performs best, and among non-drug methods resistance exercise, relaxation and work on sleep. We show what the research says, where the evidence ends and when a headache needs urgent investigation.

October 26, 2026

Cluster Headache: Symptoms, Attack Treatment and Prevention

Cluster headache is a rare, extremely severe, one-sided pain around the eye, lasting 15 to 180 minutes and returning in series, often at the same time of day. An attack is best aborted by 100% oxygen at a flow of at least 12 L/min and by sumatriptan 6 mg subcutaneously — both have strong recommendations in the European guideline. Prevention is built on verapamil at a dose of at least 240 mg a day, and the newer anti-CGRP antibodies give less here than expected. We describe the symptoms, the triggers (especially alcohol during a cluster period), diagnostic mix-ups and why a first headache of this kind always needs a neurologist's assessment.

October 26, 2026

Headache After Exercise, Coughing and Sex: Causes and When to Get Tested

A headache brought on by exertion, coughing or sexual activity is most often a benign primary headache that responds well to indomethacin. But this is one of those situations in which benignity must not be assumed: almost half of cough headaches have a secondary cause, usually a type I Chiari malformation, and a sudden 'thunderclap' pain with exertion or sex may mean subarachnoid haemorrhage or reversible cerebral vasoconstriction syndrome. We explain how to tell primary from secondary forms, when a CT scan and MRI are needed and what to do with a first headache of this kind.

October 26, 2026

Trigeminal Neuralgia: Symptoms, Causes and Treatment

Trigeminal neuralgia is an attack-like, one-sided facial pain resembling an electric shock, triggered by touch, chewing or talking and lasting from a fraction of a second to two minutes. It most often results from compression of the nerve by a blood vessel, but it can also be a sign of multiple sclerosis or a tumour, which is why guidelines recommend an MRI scan in every patient. First-choice drugs are carbamazepine and oxcarbazepine, and when they fail or are not tolerated — surgery, above all microvascular decompression. We explain the symptoms, the classification, the evidence on drugs and procedures and how to tell this disease from a toothache.

October 26, 2026

Medication-Overuse Headache (Rebound): How to Recognise It and Come Off the Drugs

Medication-overuse headache (MOH, colloquially 'rebound') is a daily or near-daily headache that arises when painkillers or migraine drugs are taken too often: ordinary drugs (paracetamol, ibuprofen, aspirin) on at least 15 days a month, and combination drugs, triptans and opioids on at least 10 days, for more than 3 months. It affects about 0.5–2% of the population, and effective treatment exists: education, prevention and — if necessary — a break from acute drugs. In a Danish randomised trial, withdrawal combined with prevention from the start gave the most cures. We explain how to recognise the problem, how to withdraw safely and why caffeine complicates the picture.

October 26, 2026

Decaf Coffee: Is It Healthy, and Does It Work the Same as Regular Coffee?

In large cohort studies decaffeinated coffee is linked to a similarly lower risk of death and type 2 diabetes as regular coffee, so part of coffee's health associations does not come from caffeine. There are exceptions, though: a protective link with Alzheimer's and Parkinson's disease was seen only for caffeinated coffee, and decaf is not completely caffeine-free either. We look at what depends on caffeine and what on the rest of coffee's components, plus the stomach, reflux and the worry about the solvent used for decaffeination.

October 24, 2026

Alkaline Water (High pH): Does It Have Any Health Effect?

Alkaline water is marketed as a way to “de-acidify” the body, hydrate better, strengthen bones and protect against disease. Physiology is clear that drinking something does not move blood pH, which the body holds in a narrow 7.35–7.45 window. The literature does contain a few narrow, specific signals: pepsin inactivation in a test tube, a randomised trial of bicarbonate-rich water for heartburn, and small shifts in bone-resorption markers. We separate what is documented from what is marketing.

October 24, 2026

Presbyopia After 40: Why Close Vision Gets Worse and What You Can Do

Presbyopia, or age-related farsightedness, is the natural, progressive worsening of near vision that affects practically everyone who reaches middle age. We explain why the lens loses its ability to accommodate, how to recognise presbyopia and tell it apart from other causes, what the real correction options are (glasses, contact lenses, procedures), what is known about pilocarpine eye drops (results of randomised trials and meta-analyses and the status in the USA) and why there is no convincing evidence for supplements and eye exercises.

October 24, 2026

Dry Skin: Causes, and Do Ceramides Really Help?

Dry skin (xerosis) is in most cases a problem of the skin barrier: too little water and lipids in the stratum corneum, made worse by dry air, hot water and detergents. A Cochrane review of 77 trials and 6,603 people shows that emollients reduce disease severity and the number of flares, but there is no reliable evidence that one product is better than another, and studies comparing ceramide creams with simple emollients showed no clear advantage. We explain where dry skin comes from, when ceramides make sense, how urea and glycerin work, and how to build an effective, inexpensive routine.

October 22, 2026

Bloating After Eating: Causes and How to Work It Out Step by Step

Bloating after eating is among the most common digestive complaints, yet it rarely comes down simply to 'too much gas'. Studies show that in many people the amount of gas in the gut is normal, while it is transported and tolerated worse, and the gut reacts with hypersensitivity. We explain the difference between the feeling of bloating and visible abdominal distension, point out the most common causes (irritable bowel syndrome, carbohydrate intolerances, celiac disease, constipation, SIBO) and show in what order to investigate symptoms so as to avoid unnecessary tests and not miss anything serious.

October 22, 2026

Ashwagandha: Morning or Evening, and How Long to Take It?

Ashwagandha is one of the most popular adaptogens, but the question of time of day and duration of use divides even experienced users: morning for stress, evening for sleep, or twice a day? We look at how it was dosed in clinical trials (240 mg once daily, 2 × 300 mg, 600 mg a day), what a meta-analysis says about effectiveness depending on dose and duration, and whether there is evidence for taking breaks. We also state honestly what we do not know: we found no direct morning-versus-evening comparison.

October 21, 2026

Melatonin: How Many mg for Sleep? 0.5, 1, 3 or 5 mg, and When to Take It

Shelves hold tablets from 0.5 to 10 mg, and the internet keeps repeating that more is better. We look at what the studies actually show: physiological doses (0.1-0.3 mg) improved sleep in older people with insomnia, a meta-analysis points to a modest effect (on average about 7 minutes shorter time to fall asleep), and the melatonin content of supplements can differ from the label by several hundred percent. We also explain when to take melatonin, how immediate release differs from prolonged release, and when it is not worth using.

October 21, 2026

Waking Up at 3 AM: Causes and What to Do About It

Do you wake in the middle of the night and cannot fall back asleep? You are far from alone: in a study of more than 22,000 Europeans, nearly one in three adults woke at least three nights a week. We explain what is normal sleep physiology and what is a warning sign, from cortisol and alcohol to sleep apnea, menopause and depression, and which methods have real research support versus which are just popular myths.

October 17, 2026

Tired After 8 Hours of Sleep: Why You Wake Up Unrefreshed

Do you sleep eight hours and still feel as if you had not slept at all? Sleep duration is only one dimension of rest. Whether you wake refreshed also depends on sleep quality and continuity, timing, any breathing or movement disorders at night, and illnesses and deficiencies that tire you regardless of hours in bed. We explain what to check first, which tests make sense and when the symptom needs a doctor.

October 17, 2026

Why Is Ferritin Low Despite a Normal Blood Count?

Because ferritin reflects iron stores, which are depleted first — changes in the blood count show up later, only once the bone marrow can no longer compensate for the shortage of raw material for red-cell production.

Why Is RDW High Despite a Normal Blood Count?

RDW rises when red blood cells start varying in size more than usual — it can signal early iron deficiency before MCV changes, or, less often, a masked mixed deficiency (iron plus B12/folate).

Prolactin (Blood Test)

Prolactin is a pituitary hormone best known for its role in lactation, but an elevated level can also be the first sign of a pituitary tumor, hypothyroidism, medication side effects, or simply the stress of the blood draw itself.

Sleep Apnea (Obstructive and Central)

Sleep apnea isn't one uniform problem — it's a group of sleep-breathing disorders with distinct mechanisms: obstructive (OSA), caused by mechanical collapse of the throat, and central (CSA), caused by instability of the brain's breathing control — united by a shared outcome: repeated overnight drops in blood oxygen and fragmented sleep.

CBT-I (Cognitive Behavioral Therapy for Insomnia)

CBT-I is a structured, multi-component treatment program — not a single technique or a list of sleep-hygiene tips — that US and European clinical guidelines recommend as first-line treatment for chronic insomnia, ahead of sleep medication.

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.

Parasomnias: Sleepwalking and Night Terrors

Sleepwalking and night terrors are disorders of arousal from deep NREM sleep, in which the brain is simultaneously part asleep and part awake — the affected person acts, and sometimes screams or walks, with no memory of it the next day.

Sleep and Growth Hormone / Cortisol Secretion

Sleep architecture — specifically the presence of deep slow-wave sleep — directly drives the largest daily pulse of growth hormone, while sleep acts as an anchor synchronizing the daily cortisol rhythm. Disrupted sleep dysregulates both systems regardless of how many hours we actually spend in bed.

Sleep and Immunity

Sleep isn't just about muscle and brain recovery — it's one of the immune system's primary regulators, and even a single short night measurably changes natural killer cell activity and susceptibility to viral infection.

Sleep and Cardiovascular Health

The American Heart Association recognizes sleep as one of eight essential pillars of cardiovascular health — both too little and chronically fragmented sleep measurably raise the risk of hypertension, atherosclerosis, and cardiac events.

Sleep and Mental Health

Insomnia isn't just a symptom accompanying depression or anxiety — the largest randomized intervention trial in psychiatric history showed that improving sleep directly reduces paranoia, hallucinations, anxiety, and low mood.

Sleep, Aging, and Longevity

The discovery of the glymphatic system showed that deep sleep physically flushes the brain of metabolic waste, including beta-amyloid — and short sleep in midlife is associated with a markedly elevated risk of dementia decades later.

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.

Orthosomnia — Obsession with Sleep-Tracking Data

The harder you try to optimize your sleep based on your watch's data, the worse you might actually sleep — orthosomnia is a documented phenomenon in sleep medicine in which an obsessive pursuit of a 'perfect' tracker score becomes, by itself, a cause of insomnia.

Caffeine

The most widely consumed psychoactive substance in the world — with one of the most solid evidence bases of any nootropic, but also a real risk of disrupting sleep when used incorrectly.

Prebiotic Fiber

The fraction of fiber not digested by humans that becomes food for beneficial gut bacteria — one of the simplest, best-documented ways to support a healthy microbiome.

Ferritin

An iron-storage protein whose blood level is the best available indicator of the body's iron stores — though it can be falsely elevated by inflammation, which complicates straightforward interpretation.

DEXA scan

The gold standard for measuring bone mineral density and one of the most accurate ways to assess body composition — more precise than popular bioimpedance scales.

Polycystic Ovary Syndrome (PCOS)

The most common hormonal disorder among women of reproductive age — it combines irregular cycles, excess androgens, and insulin resistance, but responds substantially to lifestyle changes.

Postbiotics

The newest member of the 'biotics' family, formally defined only in 2021 — inanimate microorganisms and their metabolites, which don't need the bacteria to survive in order to work.

Proton Pump Inhibitors (PPIs)

Among the most commonly prescribed drugs in the world, effectively suppressing stomach acid production — but increasingly used chronically for longer than clinical guidelines suggest.

Endometriosis

A chronic disease affecting about 10% of women of reproductive age, still diagnosed with a multi-year delay on average — despite pain severe enough to significantly disrupt daily functioning.

Neuroplasticity

The brain's ability to physically change its structure and neural connections in response to experience and learning — documented on imaging even in adults, not just in childhood.

Clustered Bracket (Inonotus cuticularis)

A bracket fungus rare in Poland, growing mainly on beech trees, chemically characterized in essentially just one Iranian screening study — otherwise, practically no scientific data exists on this species.