Dosage · Supplement

Biotin (B7): dosage and how to take it

Per clinician; stop before blood tests.

Assembled by the app from other entries in this library. It adds no evidence of its own — follow the links to the entries it draws on.

The evidence in words

Only needed for deficiency; stop biotin several days before blood tests.

There are no strict timing conflicts on record for Biotin (B7); consistency matters more than the exact hour for most goals.

It is a cofactor for carboxylase enzymes; hair/nail benefits appear only when biotin is genuinely lacking.

Skip it for hair unless you're deficient — and always tell the lab, because high-dose biotin falsifies thyroid and cardiac tests.

As the entry records it, from the studies it summarises. Not a recommendation for you — doses that suit a trial population may not suit you.

Entries that share this one's tags or conditions.

Aloe Vera: dosage and how to take itGel for minor burns.Evidence grade C
Astaxanthin: dosage and how to take it4–12 mg/day with fat.Evidence grade C
Biotin (B7) for Deficiency-related hair lossEvidence grade B — Reverses itEvidence grade B
Biotin (B7) for Hair/nails (non-deficient)Evidence grade D — Only helps if deficientEvidence grade D

This entry lists no references of its own — it is assembled from the entries it links to, whose sources are on their pages.

Last revised Jul 10, 2026. A grade is this entry's reading of the evidence, not medical advice.