Blog
News, research and guides
755 articles from the VitMode editorial team.
GuidesLow White Blood Cell Count (Leukopenia, Neutropenia): Causes and When It Is Serious
White cells below 4 G/L is leukopenia, but it is the neutrophil count (ANC) that determines infection risk: below 1.5 G/L is neutropenia, below 0.5 G/L severe. Causes range from harmless (a viral infection, an inherited lower baseline in people with the Duffy-null phenotype) to drugs, B12, folate and copper deficiency, autoimmune disease and, less often, marrow disease. We explain how to tell them apart, what to test and when to see a doctor straight away.
VMRedakcja VitMode — Badania i biomarkery12 min
October 21, 2026
GuidesHigh MCV (Macrocytosis): Causes Beyond Vitamin B12 Deficiency
An MCV above 100 fL is macrocytosis, meaning large red blood cells. The most common causes are alcohol, vitamin B12 or folate deficiency and drugs, but the list is longer: liver disease, an underactive thyroid, myelodysplastic syndromes, reticulocytosis after bleeding or haemolysis and sometimes an artefact. We explain how to tell megaloblastic from non-megaloblastic causes, what to order in sequence and when to see a haematologist.
VMRedakcja VitMode — Badania i biomarkery12 min
October 21, 2026
GuidesElevated TSH with Normal FT4: Should You Treat Subclinical Hypothyroidism?
Elevated TSH with a normal FT4 is subclinical hypothyroidism — one of the most common surprise findings on routine blood tests. The best available data, including the TRUST trial of 737 people aged 65 and over and a meta-analysis of 21 trials, show that in most adults with TSH below 10 mIU/L levothyroxine does not improve wellbeing or quality of life. There are exceptions: TSH above 10, pregnancy and trying to conceive, younger patients with clear symptoms, and goitre. We explain when to wait, when to repeat the test and when treatment genuinely makes sense.
VMRedakcja VitMode — Hormony i endokrynologia13 min
October 21, 2026
GuidesLow TSH: Causes (Subclinical Hyperthyroidism) and What to Do Next
A low TSH with normal thyroid hormones is subclinical hyperthyroidism — or only its appearance. The cause may be Graves’ disease, an autonomous nodule, thyroiditis, too high a dose of levothyroxine, pregnancy, severe illness, or even biotin distorting the result. We explain how to tell these situations apart, when a low TSH raises the risk of atrial fibrillation and fractures (an analysis of 52,674 and of 70,298 people) and what the European guidelines recommend.
VMRedakcja VitMode — Hormony i endokrynologia13 min
October 21, 2026
GuidesElevated Anti-TPO with Normal TSH: What It Means and Is It Already Hashimoto’s?
Positive anti-TPO antibodies with a normal TSH are found in roughly one in ten people in the general population — this is not yet hypothyroidism and does not necessarily need treatment. They do, however, indicate a higher risk of future hypothyroidism, so regular TSH monitoring is key. We discuss how many people have positive anti-TPO, how often progression occurs, what is really known about the link with miscarriage (the TABLET and T4LIFE trials) and what can be said about selenium and vitamin D.
VMRedakcja VitMode — Hormony i endokrynologia13 min
October 21, 2026
GuidesTSH Test: Fasting, What Time of Day, and Before or After Levothyroxine?
TSH has a marked daily rhythm: the highest levels are recorded at night and in the early morning, the lowest in the afternoon. In one study the median TSH in women with subclinical hypothyroidism fell from 5.83 mU/L in the morning to 3.79 mU/L in the afternoon, and in small studies a meal lowered it as well. We explain what time of day and under what conditions to have a TSH test, whether you need to fast, when to take levothyroxine and how to stop biotin so that successive results are comparable.
VMRedakcja VitMode — Żywienie, suplementy i trening12 min
October 21, 2026
GuidesLevothyroxine: How to Take It — With Coffee, Breakfast and Calcium?
Levothyroxine is usually recommended to be taken in the morning on an empty stomach, with water, 30–60 minutes before breakfast. Studies show why: coffee lowered thyroxine absorption by about a third, calcium carbonate raised mean TSH from 1.6 to 2.7 mIU/L, and drugs that reduce stomach acidity increase the dose requirement. We also explain what bedtime dosing, liquid and softgel forms offer, and what to do when the brand of the drug changes.
VMRedakcja VitMode — Badania i biomarkery13 min
October 21, 2026
GuidesDutasteride vs Finasteride: Differences, Effectiveness and Safety in Male Pattern Hair Loss
Dutasteride and finasteride are two 5-alpha-reductase inhibitors used against androgenetic alopecia, but they work differently: finasteride mainly blocks the type II enzyme and lowers serum DHT by about 70%, while dutasteride blocks types I and II and lowers DHT by about 95%. In a head-to-head randomized trial of 917 men, dutasteride 0.5 mg produced significantly more hair than finasteride 1 mg after 24 weeks, with a similar adverse-event profile in these studies. There is a catch, though: in Poland and the EU dutasteride is not licensed for hair loss, and the comparative data come from short, manufacturer-sponsored trials. We explain what this means in practice.
VMRedakcja VitMode — Hormony i endokrynologia12 min
October 21, 2026
GuidesFinasteride Side Effects (Libido, Depression, Post-Finasteride Syndrome) — What the Research Shows
Finasteride 1 mg is one of the best-studied drugs for androgenetic alopecia, yet it stirs the strongest emotions because of possible side effects: reduced libido, erectile dysfunction, low mood and so-called post-finasteride syndrome (PFS). Data from randomized trials in hair loss did not show a significant rise in sexual problems, but their confidence intervals are wide; observational studies give conflicting results on depression; and in 2025 the European Medicines Agency confirmed a link between finasteride and suicidal ideation and tightened the leaflets. For PFS the evidence is limited and disputed. We describe what is actually known and what is not, who should be especially careful, and what to do if worrying symptoms appear.
VMRedakcja VitMode — Hormony i endokrynologia13 min
October 21, 2026
GuidesFerritin and Hair Loss: What Level Is Optimal, and Does the 70 ng/ml Rule Make Sense?
A rule circulates online that in hair loss ferritin should be at least 70 ng/ml and that the ‘laboratory norm’ of 15–30 ng/ml is too low. What do studies say? The evidence is conflicting: in one controlled study of 457 women iron deficiency was no more common in women with hair loss than in healthy ones, in others ferritin was significantly lower in people with hair loss, and randomized trials of iron supplementation in non-anaemic hair loss practically do not exist. We explain where 70 ng/ml came from, what is really known about iron deficiency and telogen shedding, when ferritin is irrelevant (androgenetic alopecia) and how to handle it sensibly.
VMRedakcja VitMode — Badania i biomarkery12 min
October 21, 2026
GuidesAlopecia Areata: Symptoms, Causes and Treatment (Including JAK Inhibitors)
Alopecia areata is an autoimmune disease in which the immune system attacks hair follicles and causes sudden hair loss in round patches, sometimes progressing to loss of hair on the whole scalp or body. It is not contagious, and the follicles are usually not destroyed, so hair can regrow. The course is unpredictable: some people regain hair spontaneously, while in others the disease relapses or persists for years. In recent years oral JAK kinase inhibitors (baricitinib and ritlecitinib) have been a breakthrough, restoring hair in 15–40% of people with severe disease in phase 3 trials. We describe symptoms, mechanism, coexisting diseases (thyroid, atopy, vitiligo), vitamin D levels, psychological burden and what current guidelines say.
VMRedakcja VitMode — Badania i biomarkery13 min
October 21, 2026
GuidesDermaroller (Microneedling) and Minoxidil: Does It Improve Results in Androgenetic Alopecia?
Combining scalp microneedling (dermaroller, derma pen) with minoxidil is one of the most popular home strategies for androgenetic alopecia. Randomized trials and meta-analyses do show a greater gain in hair than with minoxidil alone: in a pilot study of 100 men the mean gain after 12 weeks was 91 hairs per cm² versus 22 with minoxidil alone, and a meta-analysis of 10 trials (466 people) confirmed the advantage of the combination. At the same time the trials were small, short and very heterogeneous (I² up to 88%), and incorrect home use carries a risk of infection. We explain what is really known about needle length, frequency, hygiene and who should avoid it.
VMRedakcja VitMode — Żywienie, suplementy i trening12 min
October 21, 2026
GuidesWhen to Take Creatine: Morning, Before or After a Workout, or Evening?
Creatine is one of the best-studied supplements in the world, yet the internet is full of contradictory advice: only after training, only with carbohydrates, only in the morning on an empty stomach. We look at what the studies actually show: that effectiveness depends above all on taking a dose every day and gradually saturating the muscles, while the clock time is of secondary importance. We also cover pre- versus post-workout comparisons, loading versus a steady dose, the role of a meal, stomach tolerance and what to do on rest days.
VMRedakcja VitMode — Żywienie, suplementy i trening12 min
October 21, 2026
GuidesAshwagandha: 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.
VMRedakcja VitMode — Sen i neurobiologia12 min
October 21, 2026
GuidesZinc: Empty Stomach or With Food, Morning or Evening: When to Take It?
Zinc is absorbed best on an empty stomach, but that is exactly when it most often causes nausea. Phytates from grains and legumes can limit its absorption, iron and some antibiotics interact with it, and the upper safe intake limit (25 mg according to EFSA, 40 mg according to the FDA) is linked to the risk of copper deficiency. We explain what absorption studies actually show, how to choose a form (citrate, gluconate, oxide, glycinate), whether time of day matters, and how to arrange zinc relative to other supplements and medicines.
VMRedakcja VitMode — Badania i biomarkery12 min
October 21, 2026
GuidesVitamin K2 with D3: Do You Need to Take Them Together, and Does It Make Sense?
Combining vitamin D3 with K2 has become almost standard in supplementation, but do you really need to take them together? We look at the mechanism (carboxylation of osteocalcin and the MGP protein), the results of randomized trials on arterial calcification and bone density, including the large Danish DANCODE trial of 2026 in 400 people, and we state honestly what these studies do not settle: neither whether K2 works, nor whether D3 does, nor whether synergy exists at all. We also cover doses, the role of a fat-containing meal and absolute caution with anticoagulant drugs.
VMRedakcja VitMode — Hormony i endokrynologia13 min
October 21, 2026
GuidesMelatonin: 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.
VMRedakcja VitMode — Sen i neurobiologia12 min
October 21, 2026
GuidesMDMA-Assisted Therapy for PTSD: Does It Work? What the Trials Showed, and Why the FDA Rejected It
Two phase 3 trials (MAPP1 and MAPP2) showed strong, reproducible effects of MDMA-assisted therapy in post-traumatic stress disorder. In August 2024, the FDA nonetheless refused to approve the drug, citing serious concerns about data quality and reliability. It's a rare case where promising clinical results and a real, documented regulatory rejection coexist — and both sides of this story need to be understood to grasp the therapy's current status.
VMRedakcja VitMode — Serce i układ krążenia13 min
October 17, 2026
GuidesLSD Microdosing in Biohacking: What Do Placebo-Controlled Trials Actually Show?
LSD microdosing — taking sub-perceptual doses every few days to improve mood, creativity and focus — is one of the most popular practices in the biohacking community. The problem is that when rigorous, blinded trials with genuine placebo actually tested it, the reported benefits mostly didn't outperform placebo. It's a non-obvious, well-documented finding worth knowing before trying this practice — alongside its genuinely illegal status in Poland.
VMRedakcja VitMode — Serce i układ krążenia12 min
October 17, 2026
GuidesRed Yeast Rice as a 'Natural Statin' — What You're Actually Buying
Red yeast rice is often marketed as a gentle, 'natural' alternative to statins for cholesterol. That's a misleading oversimplification: the key active ingredient in this supplement, monacolin K, is chemically identical to lovastatin — a prescription drug. It isn't a different, gentler mechanism — it's the same drug, just produced by fermenting Monascus purpureus yeast on rice instead of in a pharmaceutical plant. The real problem lies elsewhere: in the wildly inconsistent, sometimes up to 60-fold different content of this substance in commercial products, which triggered an unprecedented regulatory response from the European Union.
VMRedakcja VitMode — Hormony i endokrynologia13 min
October 17, 2026
Guides
FIT Test and Stool DNA Tests (Cologuard) as Alternatives to Colonoscopy — What Do the Numbers Show?
Colonoscopy remains the gold standard for colorectal cancer prevention, but it requires bowel prep, sedation, and a day off work — real barriers that keep plenty of people from ever getting screened. Non-invasive tests, the fecal immunochemical test (FIT) and the stool DNA test (Cologuard), offer a different trade: a simpler, at-home screening test at the cost of lower sensitivity for detecting lesions. A large comparative study from NEJM shows exactly how big that trade-off is — and why a positive result always means one more step, never the end of the workup.
VMRedakcja VitMode — Badania i biomarkery13 min
October 17, 2026
Guides
Pneumatic Leg Compression After Training ("Recovery Boots") — What Does the Research Actually Show?
Pneumatic compression sleeves for the legs, marketed as "recovery boots" or NormaTec, promise faster recovery, less muscle soreness, and better performance in your next workout. The mechanism — sequential compression supporting venous return and lymphatic drainage — is biologically plausible, but actual studies on athletes paint a far more modest and mixed picture than the ads for these devices suggest.
VMRedakcja VitMode — Zdrowie psychiczne12 min
October 17, 2026
Guides
Type 2 Diabetes Remission — Can It Really Be Reversed? What the DiRECT Trial Showed
"Reversing" type 2 diabetes sounds like a marketing oversimplification, but behind it stands one of the most important clinical trials in diabetology in recent years — DiRECT, carried out in ordinary primary care settings, not a specialized research center. It showed that for a substantial share of patients, remission is genuinely achievable with a sufficiently large weight loss — but the word "remission" doesn't mean "cure," and the results depend heavily on how long someone has had the disease and how much weight they actually lose.
VMRedakcja VitMode — Hormony i endokrynologia14 min
October 17, 2026
Guides
Varicose Veins: Sclerotherapy, Surgery, or Laser? How to Choose a Treatment Method
Deciding how to treat varicose veins used to come down, in practice, to one option — classic vein removal (stripping). Today a patient chooses between sclerotherapy, laser or radiofrequency endovenous ablation, and traditional surgery — methods that differ in invasiveness, recovery time, and which type of varicose veins they suit. None of them, though, guarantees that the veins won't come back.
VMRedakcja VitMode — Badania i biomarkery13 min
October 17, 2026