Blog
News, research and guides
755 articles from the VitMode editorial team.
GuidesHigh Ferritin: Causes (It Is Not Always Iron Overload) and What to Do Next
A high ferritin result most often does not mean there is too much iron in your body. Ferritin is an acute-phase protein, so it rises with inflammation, fatty liver, heavy drinking, obesity and metabolic syndrome — while true iron overload (for example hemochromatosis) is far less common. The key to telling the difference is transferrin saturation and clinical context. We explain where an elevated result comes from, what a sensible order of tests looks like, and when to see a doctor.
VMRedakcja VitMode — Badania i biomarkery12 min
October 17, 2026
GuidesHigh Hematocrit Without TRT: Causes in Men and What to Do
A raised hematocrit in a man who is not on testosterone therapy is a cue for an orderly workup, not a reason to panic. Most often the cause is dehydration, smoking or sleep apnea; less often an SGLT2 inhibitor, lung or heart disease, or overproduction of erythropoietin. Polycythemia vera sits at the end of the list and is excluded by testing for the JAK2 mutation. We explain the mechanisms, the order of tests, and when to see a doctor quickly.
VMRedakcja VitMode — Hormony i endokrynologia12 min
October 17, 2026
GuidesHigh Hemoglobin: Causes and When It Is Serious
A high hemoglobin on a blood count is often a harmless result of dehydration, smoking or living at altitude, but it can also be a sign of low oxygen levels, excess erythropoietin or polycythemia vera. The difference between relative and absolute erythrocytosis, the diagnostic thresholds for women and men, and a few simple tests help tell these situations apart. We explain what a raised hemoglobin means, its most common causes, how it is investigated and when there is real reason for concern.
VMRedakcja VitMode — Badania i biomarkery12 min
October 17, 2026
GuidesElevated PSA: Causes Other Than Prostate Cancer and What Next
An elevated PSA very often does not mean prostate cancer. PSA is a protein specific to the organ, not to the tumor, so it also rises with benign prostatic enlargement, prostatitis, urinary tract infection, after ejaculation, a digital rectal exam or a biopsy. We explain the most common non-malignant causes, how to tell them apart, what PSA density and free PSA say about age and prostate volume, and what the modern diagnostic pathway looks like, with magnetic resonance imaging before a biopsy.
VMRedakcja VitMode — Hormony i endokrynologia13 min
October 17, 2026
GuidesOmega-3: How Many mg of EPA and DHA Do You Really Need Per Day?
The omega-3 dose depends on the goal and is counted in milligrams of EPA plus DHA, not milligrams of 'fish oil' on the label. For general health about 250–500 mg EPA+DHA per day is most often cited, for high triglycerides 2–4 g is used under medical supervision, and doses above 1 g a day are linked to a higher risk of atrial fibrillation. We explain how to convert labels, what the omega-3 index says, and how to match the dose to the goal without overdoing it.
VMRedakcja VitMode — Żywienie, suplementy i trening12 min
October 17, 2026
GuidesBiological Age Tests (Epigenetic Clocks): Are They Worth Taking?
Commercial biological age tests promise a single number that tells you whether you are ageing faster or slower than the date on your ID suggests. Behind that number are epigenetic clocks, algorithms that read DNA methylation patterns. The problem is that the same sample can produce results that differ by up to 9 years, different clocks say different things, and there is no validated intervention you should choose based on such a result. We look at what is actually known, who a test might suit, and why cheaper, more predictable measurements serve most people better.
VMRedakcja VitMode — Badania i biomarkery13 min
October 17, 2026
GuidesVO2max From a Smartwatch: How Accurate Is the Measurement and Can You Trust It?
Garmin, Apple Watch, Polar or Pixel Watch now show VO2max as a single number on the screen. Validation studies comparing these estimates with laboratory measurement show a mean error usually around 7-16%, and in individuals the differences can reach more than ten ml/kg/min. We explain where the watch gets this number, when it is reliable, when it fails (especially in very fit and very unfit people), how to improve accuracy and when it is better to take a real exercise test with gas analysis.
VMRedakcja VitMode — Żywienie, suplementy i trening13 min
October 17, 2026
GuidesSauna: How Many Times a Week for Health and Longevity? What the Research Says
The most quoted data on sauna come from a Finnish observational study of more than 2,300 men: people who used a sauna 4-7 times a week had clearly lower risk of sudden cardiac death and of death from any cause than those who went once a week. But it is observation, not an experiment, and the reference group was not people with no sauna at all. We explain what the numbers actually showed, how to read the dependence on frequency and session length, what the limitations are and who a sauna can harm.
VMRedakcja VitMode — Hormony i endokrynologia13 min
October 17, 2026
GuidesCold Shower: How Many Minutes, How Often and What the Research Says
A cold shower promises more energy, less illness and a faster metabolism. The best available data, from a randomised trial of 3,018 people, showed that 30-90 seconds of cold water at the end of a shower for 30 days reduced sickness absence from work by 29%, but did not change the number of days of illness. We explain how to read that result, what is science and what is marketing (dopamine, brown fat), how to choose time and temperature, and who should be careful.
VMRedakcja VitMode — Żywienie, suplementy i trening13 min
October 17, 2026
GuidesStrength Training and Longevity: How Many Times a Week Should You Train to Live Longer?
Meta-analyses of cohort studies show that people who do strength exercise have about 10-20% lower risk of death from any cause, and the greatest benefit appears at only about 30-60 minutes a week, that is 2-3 short sessions. The curve is J-shaped: larger volumes do not give additional benefit, although the confidence intervals there are wide. We explain what these analyses actually showed, what the minimum effective dose is, how to combine strength with endurance, what the data on grip strength and sarcopenia say and when to check your plan with a doctor.
VMRedakcja VitMode — Żywienie, suplementy i trening13 min
October 17, 2026
GuidesMethylfolate vs. Folic Acid: Which Form Is Right for Whom?
Supplement shelves and multivitamin labels increasingly push "methylfolate" as the default "better" form of vitamin B9, implying plain folic acid is outdated or even harmful. The biochemical truth is more nuanced: both forms have real differences, but which one actually matters for a given person depends on whether they have a genuine enzymatic conversion problem — and that applies to a far smaller group than marketing suggests.
VMRedakcja VitMode — Badania i biomarkery13 min
October 15, 2026
GuidesHow to Safely Taper Off Benzodiazepines: Protocols, Seizure Risk, and Why You Should Never Do It Alone
Benzodiazepines (diazepam, alprazolam, lorazepam, clonazepam, and others) are effective for short-term treatment of anxiety, insomnia, and panic attacks, but long-term use leads to physiological dependence that makes abrupt discontinuation one of the potentially most dangerous medication decisions a person can make. Unlike most other drugs, going "cold turkey" after long-term benzodiazepine use carries a real, well-documented risk of life-threatening seizures. This article explains the mechanism behind that risk, describes the actual tapering protocols used clinically — including the so-called Ashton Manual — and explains why safe discontinuation requires medical supervision, not a do-it-yourself biohacking plan.
VMRedakcja VitMode — Hormony i endokrynologia15 min
October 15, 2026
GuidesSSRI and SNRI Discontinuation Syndrome: the FINISH Mnemonic, Half-Life-Dependent Risk, and How to Tell It Apart From a Depression Relapse
SSRIs (e.g., sertraline, escitalopram, fluoxetine) and SNRIs (venlafaxine, duloxetine) are effective and generally well tolerated for treating depression and anxiety disorders, but stopping them abruptly — especially after longer-term use — can trigger a discontinuation syndrome with a recognizable set of symptoms that's often mistaken for a relapse of the underlying condition. The risk and severity of these symptoms differ substantially between specific drugs, largely depending on their half-life. This article explains how to recognize discontinuation syndrome using the clinical FINISH mnemonic, how it differs from a depression relapse, and why safely stopping an antidepressant requires a plan made with a doctor, not a decision made alone.
VMRedakcja VitMode — Hormony i endokrynologia14 min
October 15, 2026
GuidesPSA Screening: Why It's One of the Most Controversial Decisions in Preventive Medicine
PSA (prostate-specific antigen) testing sounds simple: a higher result, a greater suspicion of prostate cancer. The reality is far more complicated — the USPSTF, the leading US guideline body, has changed its recommendation on this topic more than once over the past decade, and two large randomized screening trials reached different conclusions about the benefit of screening. At the root of this controversy is a fundamental problem: PSA screening catches real cancers, but it also leads to substantial overdiagnosis and overtreatment of cancers that would never have caused harm, at the cost of real complications from biopsies and treatment. This article explains the controversy and helps you understand what a shared decision-making conversation with your doctor looks like.
VMRedakcja VitMode — Hormony i endokrynologia14 min
October 15, 2026
GuidesThe Blood Type Diet: Does It Actually Make Any Scientific Sense?
Peter D'Adamo's blood type diet tells you to eat completely differently depending on whether you're type O, A, B, or AB, promising better digestion, more energy, and easier weight loss. The theory sounds scientific — it talks about lectins reacting differently with different blood types — but when researchers finally tested it directly, the result was unambiguous. We look at what that study actually found and why this isn't a topic that "needs more research."
VMRedakcja VitMode — Żywienie, suplementy i trening12 min
October 15, 2026
GuidesOil Pulling: Does Swishing Oil in Your Mouth Actually Work?
Oil pulling — swishing a spoonful of coconut or sesame oil around your mouth for several minutes — has made a comeback in recent years as a popular wellness practice, often marketed as a way to "pull toxins" out of the entire body. The systemic detox mechanism has zero scientific support, but underneath that marketing gloss there's something genuinely real: a handful of small clinical trials do show a modest reduction in oral bacteria and plaque. We look at exactly where the evidence actually ends and the exaggeration begins.
VMRedakcja VitMode — Sen i neurobiologia12 min
October 15, 2026
GuidesPatellar Tendinopathy (Jumper's Knee): Why It Isn't a Simple "Tendinitis"
Jumper's knee (patellar tendinopathy) is a good example of how an injury's very name can be misleading — histopathology research over the last three decades has shown that in most cases this isn't classic inflammation, but a degenerative process that requires a fundamentally different treatment approach than rest and anti-inflammatory drugs.
VMRedakcja VitMode — Żywienie, suplementy i trening14 min
October 15, 2026
GuidesArmodafinil vs. Modafinil: Does the R-Enantiomer Really Work 'Cleaner and Stronger'?
Armodafinil is sometimes marketed as an 'improved,' purer version of modafinil — stronger, longer-lasting, without the baggage of a second enantiomer. We check what the original pharmacokinetic and clinical studies from both drugs' approval process actually show, and whether the difference is as dramatic as the marketing suggests.
VMRedakcja VitMode — Zdrowie psychiczne13 min
October 12, 2026
GuidesBox Breathing: The 4-4-4-4 Technique — What Does the Science Actually Say?
Box breathing is a simple breathing pattern — inhale for 4, hold for 4, exhale for 4, hold for 4 — partly popularized through stories about special-forces units and performing 'under pressure.' The real science behind it is more modest than the marketing, but still concrete: slow, regular breathing measurably increases parasympathetic activity, and a handful of small studies show it lowers subjective anxiety — without the dramatic claims about 'controlling any stressful situation.'
VMRedakcja VitMode — Żywienie, suplementy i trening13 min
October 12, 2026
GuidesDry Fasting: Is Giving Up Water Along With Food Actually Safe?
Dry fasting means giving up not just food but water too — a practice promoted in some biohacking circles as a 'stronger version' of standard water fasting. Unlike intermittent fasting or even longer water fasts, dry fasting carries a real, categorically different risk of dehydration and kidney strain — and the scientific evidence for its supposed unique benefits is, put plainly, very weak or nonexistent.
VMRedakcja VitMode — Hormony i endokrynologia14 min
October 12, 2026
GuidesExtended Fasting, 72 Hours and Beyond: What Really Happens in the Body, and How to Break It Safely
Fasting for 72 hours or longer is an entirely different category than the popular 16:8 protocol covered in our entry on intermittent fasting — a different level of ketosis, of reserve mobilization, and above all, a different level of risk requiring a different approach to safety. The most important, most commonly overlooked part of that risk doesn't occur during the fast itself, but afterward: refeeding syndrome, a well-described, potentially fatal complication of returning to food after an extended period of underfeeding.
VMRedakcja VitMode — Hormony i endokrynologia15 min
October 12, 2026
GuidesWhite-Coat Hypertension: How to Recognize It, and Is It Really Harmless?
Blood pressure that's high only at the doctor's office but normal at home — this phenomenon has a name (white-coat hypertension), and for decades it was considered nearly harmless, just a stress effect. A 2019 meta-analysis found something more complicated: in untreated people with this pattern, cardiovascular death risk was more than double that of people with normal blood pressure. This is still an actively studied, unsettled topic — worth knowing before you dismiss your next 'high' reading in the waiting room.
VMRedakcja VitMode — Hormony i endokrynologia13 min
October 12, 2026
GuidesVaricocele and Sperm Quality: What Does the Research on Surgery Actually Show?
Varicocele, an enlargement of the veins in the scrotum's pampiniform plexus, is the most commonly identified, potentially reversible cause of male infertility. The problem is that the medical literature has been divided for decades on one key question: does surgically correcting a varicocele actually increase the chance of having a child, or does it just improve the numbers on a semen analysis without translating into pregnancy? We look at what the meta-analyses, a randomized clinical trial, and a Cochrane review actually show — and why there still isn't one agreed-upon answer.
VMRedakcja VitMode — Hormony i endokrynologia13 min
October 12, 2026
GuidesPerimenopause vs. Menopause: What's the Difference, and Why It Matters
"I'm going through menopause" is something you often hear from women who are, in fact, still getting periods — just irregular ones — and that's not a trivial slip, because the line between these two terms is surprisingly precise, and blurring it leads to mistaken expectations about your own body. Perimenopause and menopause are two different, sequential stages, and paradoxically the first one — with its chaotically swinging hormones — is often harder to live with symptomatically than the stably low hormone levels that follow menopause. We look at exactly where the line falls, how the biology of each stage differs, and how to actually track them.
VMRedakcja VitMode — Badania i biomarkery13 min
October 12, 2026