Biotin (B7) for Deficiency-related hair loss

Evidence grade B — Reverses it

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.

1 at grade B — 1 graded row

What is known

Each outcome with its grade (how strong the evidence is, A to D), the size of the effect where the entry records one, and how often studies agree.

Outcome	Grade	Effect size	Agreement
Deficiency-related hair lossReverses it	Evidence grade B	Moderate	high

For deficiency-related hair loss, Biotin (B7) earns evidence grade B (moderate effect, high consistency) — there is real evidence here. Reverses it

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

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

Safe, but the lab-test interference is a real clinical hazard — disclose supplementation before testing.

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.

Biotin (B7) for Hair/nails (non-deficient)Evidence grade D — Only helps if deficientEvidence grade D
Biotin (B7): dosage and how to take itPer clinician; stop before blood tests.Evidence grade C
Biotin (B7): side effects, safety & interactionsSafe, but the lab-test interference is a real clinical hazard — disclose supplementation before testing.Evidence grade C
Aloe Vera for Glycemic control (oral)Evidence grade C — Inner-leaf gelEvidence grade C

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.