Biotin: What It Is, Forms, Cautions, and Clean Brands

Biotin is vitamin B7. It supports healthy hair, skin, and nails.*

Forms and what to look for on the label

Doses on the market range from 30 mcg to 10,000 mcg or more.

Before you take it

High-dose biotin can distort lab tests, including some thyroid and heart (troponin) tests. Stop it before bloodwork, and tell your doctor you take it.