When to take it
With food, any time of day.
← All supplements
VitaminsWeak evidence
Biotin
Also known as: vitamin B7, vitamin H
Biotin is a B vitamin involved in fat, carbohydrate and protein metabolism and in maintaining healthy hair and skin. True deficiency is rare, and in people without it a supplement does not visibly improve hair or nails.
What it is used for
- Maintenance of normal hair and skin – strong evidence for the basic role (EFSA)
- Better hair and nails with proven deficiency – moderate evidence
- Hair growth and stronger nails without deficiency – weak evidence
Forms and how they differ
D-biotin
standard form, in doses from 50 µg to several mg
biotin with selenium and zinc
common hair combination; add up doses with other supplements
Pairs well with
Zinc, selenium, enough protein.
Do not combine / separate
Do not combine several high-dose biotin products.
Watch out for
High-dose biotin can distort laboratory tests (e.g. thyroid hormones, troponin). Before a blood test tell your doctor you take biotin and pause it for a few days as advised. In pregnancy and if you take medicines, consult your doctor.
Safety
EFSA has not set an upper limit; do not exceed the label dose.
Practical tip
With hair loss, first have ferritin, thyroid and vitamin D checked – they are more common causes than biotin.
Products containing Biotin 6
Biotin + selenium + zinc+ selenium + zinc
Biotin 10 mgD-biotin · 10 mg / capsule
Biotin 1000 µg1 000 µg / serving
Biotin 2500 µgD-biotin · 2 500 µg / capsule
Biotin D-biotin 300 µgD-biotin · 300 µg / capsule
Biotin 5000 µgD-biotin · 5 000 µg / capsule
How to read the evidence rating
Strong evidenceModerate evidenceWeak evidenceNo evidence
Strong = several good human studies or official recommendations; moderate = promising but smaller studies; weak = few studies or mixed results; no evidence = claims not confirmed.
Combination check
Select the supplements you take and, if relevant, your medicines. We show what interferes, what needs a time gap and what to watch out for.
Check Biotin with othersWhich supplements do you actually need?
Fénix Methode picks them from your blood results and schedules when to take what – no needless purchases.
From the same group
B complexModerate evidenceBeta-caroteneWeak evidenceBrewer's yeastWeak evidenceCamu camuWeak evidenceCholineModerate evidenceFolateStrong evidence
Important notice
This information is educational and does not replace advice from a doctor or pharmacist. We do not give medicine dosages. Supplements are no substitute for a varied diet; if pregnant, breastfeeding, ill or on medication, consult a doctor first.