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Everything here is reference information drawn from the research literature, not medical advice, and Lamduan is neither a doctor nor a pharmacist. Supplements are not medicines and do not replace anything a doctor has prescribed. If you take regular medication, are pregnant or breastfeeding, have liver or kidney disease, or have surgery coming up, speak to a pharmacist or doctor before starting anything on this page.
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All supplements 75
Tap a name for all six answers. Every answer carries a badge saying how strong the evidence is, and where the marketing does not match the research, it says so plainly.
A B vitamin the body needs 30 mcg of a day. Hair and nail products commonly contain 5,000-10,000 mcg — 150 to 300 times that.
🎯What it helps withWeak
Genuinely helps only people who are biotin deficient, which is rare. In everyone else there is almost no trial evidence for hair or nails.
⚗️Effect on hormonesNo human data
No real hormonal effect — but it makes hormone test results wrong, which is not the same thing.
Weight and fat lossNo human data
Nothing to do with fat loss.
🌙SleepNo human data
Nothing to do with sleep.
❤️Other health effectsWeak
Hair, skin and nails as advertised, though the evidence is far weaker than the marketing.
📏Dose and ceiling
Commonly used: 30-10,000 mcg per day
No limit — no toxicity reported. But this one carries a different kind of danger entirely; see the caution.
Caution
This matters more than it looks. High-dose biotin interferes with many blood assays: it makes troponin — the test for a heart attack — read falsely low, and a patient has died because of exactly that. It also skews thyroid results badly enough that people have been diagnosed with Graves disease they do not have. A single 10 mg dose interferes within 24 hours. Stop at least 2-3 days before any blood test, and tell the lab every time.