Blog
News, research and guides
755 articles from the VitMode editorial team.
GuidesBioidentical Hormones: Are They Actually Safer Than Standard Therapy?
"Bioidentical" is one of the most effective marketing words of the last decade in hormone therapy — it suggests something closer to nature, and therefore safer than "synthetic" drugs. The problem is that the very definition of "bioidentical" (molecularly identical to the hormone the body produces) doesn't settle anything about safety, and many approved, standard hormonal drugs — including popular estradiol patches — are, in the strictly chemical sense, just as bioidentical as compounded preparations. We look at where the actual safety line falls, and why it isn't where the marketing suggests.
VMRedakcja VitMode — Badania i biomarkery14 min
October 12, 2026
GuidesMK-4 vs. MK-7 — Which Form of Vitamin K2 Should You Choose?
"Vitamin K2" on a supplement label is actually one of two very differently behaving molecules — MK-4 and MK-7 — which differ in how long they persist in the blood so drastically that one can be undetectable in serum even after regular intake, while the other remains detectable for 48 hours after a single dose. This isn't a cosmetic marketing difference — it's a difference that determines how to interpret most studies on K2, since the key clinical trials on bone and heart health used different forms at very different doses.
VMRedakcja VitMode — Hormony i endokrynologia13 min
October 12, 2026
GuidesDasatinib and Quercetin (D+Q): Why an Oncology Drug Was Paired With a Flavonoid, and What It Actually Means
The D+Q protocol — dasatinib, an oncology drug used in chronic myeloid leukemia, combined with quercetin, a widely available flavonoid — is today's best-studied senolytic combination in humans. Our earlier articles on fisetin and on quercetin as senolytics covered the same pilot trials from a different angle. Here we focus on the question those pieces skipped: why dasatinib, a drug with real, non-trivial toxicity, became quercetin's partner, and what the 'hit-and-run' dosing logic behind the whole protocol actually means.
VMRedakcja VitMode — Badania i biomarkery14 min
October 10, 2026
GuidesUrolithin A vs. C and D — What's the Difference?
Urolithin A, C, and D sound like variants of the same supplement differing only by a letter — in reality, these are three distinct molecules with very different levels of evidence. Urolithin A has several randomized clinical trials in humans and the Mitopure brand behind it, while C and D remain almost entirely at the cell-study stage. This distinction regularly gets blurred in supplement marketing.
VMRedakcja VitMode — Badania i biomarkery14 min
October 10, 2026
GuidesOura Ring vs WHOOP: What Do We Actually Know About Measurement Accuracy?
Marketing for both devices talks about 'medical-grade precision.' Published validation studies comparing the Oura Ring and WHOOP against electrocardiography and polysomnography tell a more measured story: resting heart rate measurement is very good on both devices, heart rate variability is less clear-cut, and sleep-stage classification against true EEG remains the weakest link for both.
VMRedakcja VitMode — Sen i neurobiologia14 min
October 10, 2026
GuidesKetone Monitoring for Biohackers: Blood, Breath, or Urine?
Three ketone-measurement methods — a blood glucose/ketone meter with a blood strip, a breath analyzer, and a urine strip — give, in practice, three different numbers, measured in three different ways, with three different cost trade-offs. This guide compares them purely in the context of biohackers tracking nutritional ketosis on a low-carb diet — not monitoring diabetic ketoacidosis, which is a completely different, far more serious medical context.
VMRedakcja VitMode — Żywienie, suplementy i trening13 min
October 10, 2026
GuidesMetformin for Longevity Without Diabetes: What Do We Actually Know in 2026?
Metformin is one of the most frequently cited candidates for an anti-aging drug, yet the flagship trial meant to settle the question — TAME (Targeting Aging with Metformin) — has spent years in the planning stage, not actually running. We check what the available data really show: an intriguing but heavily confounded observation that diabetics on metformin sometimes outlive healthy controls, and a less-publicized but well-documented problem — metformin may blunt training adaptations in people who exercise seriously.
VMRedakcja VitMode — Badania i biomarkery14 min
October 10, 2026
GuidesRapamycin Once a Week: Where Did the Pulsed Dosing Protocol Come From?
People using rapamycin off-label for anti-aging purposes almost never take it daily like transplant patients — instead, pulsed dosing dominates, most often once a week. In our entry on rapamycin and longevity we covered the broader picture of animal research and the PEARL trial — here we focus specifically on where weekly dosing actually came from, what the PEARL trial actually tested on this question, and why the honest answer to "what's the optimal human dose" is still: we don't know for sure.
VMRedakcja VitMode — Badania i biomarkery13 min
October 10, 2026
GuidesRapamycin, Vaccines, and Alcohol: What the Literature Says About Real Interactions
Rapamycin is a real immunosuppressive drug, not a supplement — and that means concrete, well-documented interactions from transplant-medicine literature that are rarely discussed in materials promoting its off-label use for longevity. We examine two topics: blunted vaccine response (well described in transplant patients) and interaction with alcohol (real, but more modest than sometimes assumed).
VMRedakcja VitMode — Badania i biomarkery13 min
October 10, 2026
GuidesIV NAD+: Does It Really Work Better Than Oral NMN or NR?
Longevity clinics market intravenous NAD+ infusions as a way around the absorption limits of oral precursors like NMN or NR, described in our NMN entry. The pharmacokinetic argument — bypassing first-pass metabolism in the gut and liver — sounds convincing, but we check what's actually known about whether the large, electrically charged NAD+ molecule injected into the blood even gets into cells intact, where it would theoretically need to act.
VMRedakcja VitMode — Badania i biomarkery13 min
October 10, 2026
GuidesIpamorelin vs CJC-1295: How These Two Growth-Hormone Peptides Differ
Ipamorelin and CJC-1295 are the two most commonly stacked peptides in biohacking said to stimulate growth hormone release — but they act on completely different receptors, have dramatically different half-lives, and rest on different quality evidence. This article breaks both substances down: what human studies actually confirm, what's pure extrapolation, and why the popular practice of stacking both together is a hypothesis, not an established clinical practice.
VMRedakcja VitMode — Badania i biomarkery14 min
October 5, 2026
GuidesBPC-157 and TB-500 Together: Does Stacking These Peptides Make Scientific Sense?
The "Wolverine stack" — combining BPC-157 and TB-500 in a single regenerative protocol — is one of the most popular "combos" in peptide biohacking. Marketing presents it as a natural complement: one peptide works locally, the other systemically. The problem is that neither peptide, alone or especially together, has a single human clinical trial behind it — and the theory about their mutual reinforcement is a hypothesis drawn from separate rat studies, not the result of a comparative trial.
VMRedakcja VitMode — Badania i biomarkery13 min
October 5, 2026
GuidesGLP-1 Drugs and Muscle Mass Loss: What Do Body-Composition Studies Show?
Semaglutide and tirzepatide can reduce body weight by anywhere from the teens to the low twenties percent — a figure that dominates headlines. A second figure gets far less attention: what that lost weight is actually made of. DEXA body-composition studies show that part of it is lean body mass, including muscle — a phenomenon especially relevant for older patients and those who don't strength-train during treatment.
VMRedakcja VitMode — Hormony i endokrynologia14 min
October 5, 2026
GuidesMicrodosing Ozempic: Is There Any Evidence Behind It?
On TikTok and at telehealth clinics, a promise circulates: semaglutide doses ten times lower than standard, supposedly taken for 'longevity' or 'mild appetite suppression without side effects.' The problem is that none of semaglutide's registration trials tested such doses for such indications — and the available dose-response data actually suggest the opposite.
VMRedakcja VitMode — Hormony i endokrynologia13 min
October 5, 2026
GuidesThe Yo-Yo Effect After Stopping GLP-1 Drugs: What Does Extended Follow-Up Data Show?
Semaglutide and tirzepatide deliver spectacular weight-loss results — as long as they're used. Two independent extended-follow-up trials, one for semaglutide and one for tirzepatide, show what happens after stopping: most patients regain a significant portion of lost weight within a year, and the accompanying metabolic benefits partially reverse.
VMRedakcja VitMode — Hormony i endokrynologia14 min
October 5, 2026
GuidesGLP-1 Drugs, Libido, and Testosterone in Men: What's Well Documented, and What's Speculation?
Men with obesity have, on average, lower testosterone than men with normal body weight — a well-established relationship. GLP-1 drugs, by reducing body weight, could therefore affect testosterone and libido indirectly. Less often examined is evidence for any direct effect of the drug itself on the hormonal axis, independent of weight loss — and these two mechanisms, indirect and direct, have very different strengths of evidence.
VMRedakcja VitMode — Hormony i endokrynologia14 min
October 5, 2026
GuidesPPIs and Magnesium and B12 Deficiency: What the FDA and Clinical Studies Show
Proton pump inhibitors (PPIs) — omeprazole, pantoprazole, esomeprazole, and others — are among the most widely prescribed drugs in the world and are considered safe for short-term use. With long-term, chronic use the picture is more complex: the FDA issued a formal warning about magnesium deficiency risk, and a large case-control study published in JAMA found a significantly increased risk of vitamin B12 deficiency. This isn't a reason to panic or to stop the drug on your own — it's a reason to know when it's worth asking for a follow-up test.
VMRedakcja VitMode — Hormony i endokrynologia13 min
October 5, 2026
GuidesHormonal Birth Control and B6, B12, and Folate Deficiency
Combined hormonal contraceptives are taken by hundreds of millions of women worldwide and are considered one of the best-studied drug classes in medicine. Less often discussed is their long-term effect on the status of several B vitamins — especially B6, B12, and folate. A meta-analysis covering nearly 3,000 women found a significant drop in folate levels, and other systematic reviews confirm a similar, though usually moderate, pattern for B6 and B12. This has particular practical relevance at one specific moment: the period of planning a pregnancy after stopping birth control.
VMRedakcja VitMode — Serce i układ krążenia13 min
October 5, 2026
GuidesDiuretics and Potassium and Magnesium Deficiency: Why Monitoring Matters
Loop diuretics (furosemide) and thiazide diuretics (hydrochlorothiazide) are a cornerstone of treating high blood pressure and heart failure — effective, inexpensive, and used for decades. Their mechanism of action, increasing sodium excretion in urine, inevitably comes with potassium loss, and in the case of thiazides, magnesium loss too. A large clinical study (SOLVD) found that simply taking a non-potassium-sparing diuretic was associated with higher risk of arrhythmic death in heart failure patients — while potassium-sparing drugs didn't carry that risk. This isn't a reason to avoid diuretics, which save lives, but a strong argument for regular electrolyte monitoring.
VMRedakcja VitMode — Zdrowie psychiczne13 min
October 5, 2026
GuidesAntibiotics, Vitamin K, and the Gut Microbiome: When It Actually Matters
Part of the vitamin K our bodies use doesn't come from diet — it's synthesized by gut bacteria. Broad-spectrum antibiotics, which destroy these bacteria along with pathogens, can therefore theoretically lower this internal supply of vitamin K — and in clinical practice this does have real significance, though not quite where you might intuitively expect. The biggest, well-documented problem isn't vitamin K deficiency in healthy people, but destabilized INR in patients on warfarin, where an antibiotic strengthens, rather than weakens, the blood thinner's effect.
VMRedakcja VitMode — Badania i biomarkery13 min
October 5, 2026
GuidesKSM-66 vs Sensoril: Which Ashwagandha Extract Is Better?
The label just says 'ashwagandha' plus some withanolide percentage, but behind those two names — KSM-66 and Sensoril — are two different extracts, from different parts of the plant, standardized by different methods and studied in different clinical trials. We break the difference down, including why comparing withanolide percentages across products is a trap.
VMRedakcja VitMode — Sen i neurobiologia13 min
October 5, 2026
GuidesHow to Choose an NMN Supplement: What to Look For
Our knowledge-base entry on NMN covers what is (and isn't) known about its biological effects. This article goes a step further: what independent quality testing shows about NMN products actually on the market, why this particular compound is unusually prone to degradation, and why its legal status in the European Union — including Poland — is far messier than most buyers assume.
VMRedakcja VitMode — Badania i biomarkery13 min
October 5, 2026
GuidesRetinol vs Retinal: What's the Difference and Which Should You Choose?
Retinol still has to be converted twice before skin can turn it into active retinoic acid. Retinal (retinaldehyde) needs only one enzymatic step to get there — and that seemingly small biochemical difference translates into real, measured differences in onset speed and skin tolerance.
VMRedakcja VitMode — Serce i układ krążenia12 min
October 5, 2026
GuidesNicotine Patches in Biohacking: What the Research Shows, and What the Internet Doesn't Tell You
In the biohacking community, nicotine patches have found a second life — not as a smoking-cessation aid, but as a fast, over-the-counter way to improve focus. The mechanism and some of the research genuinely back this up. Less often discussed is that this same substance is one of the most addictive on the market, and most enthusiastic write-ups skip that risk entirely.
VMRedakcja VitMode — Sen i neurobiologia12 min
October 5, 2026