No good evidence in people without a real deficiency, and biotin can skew lab tests (thyroid, troponin). Not a cure.
No good evidence in people without a real deficiency, and biotin can skew lab tests (thyroid, troponin). Not a cure.
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FAQ
Will taking biotin grow more hair?
Unless you have a genuine biotin deficiency, there's no good evidence that biotin supplements help hair growth. Because biotin deficiency itself is very rare, extra supplementation is unlikely to do anything for most people eating a balanced diet.
Is it true biotin can affect my medical test results?
Yes — high-dose biotin can skew blood tests such as thyroid function and troponin (a marker of heart damage), which can lead to misleading readings. If you have tests coming up, it's very important to tell your clinician you're taking biotin beforehand.
So are supplements completely pointless?
An all-in-one "hair vitamin" that papers over the question of deficiency is hard to recommend, but if iron (ferritin), vitamin D, or zinc are genuinely low, correcting that is worthwhile. Rather than supplementing blindly, the sensible step is to check for deficiency with a blood test first.
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