Looking for the best biotin supplement? We reviewed nine RD-approved options that support hair, skin, and nails. See our top ...

You may have heard of biotin in regard to potential ways to strengthen your hair and nails. And it does ... blood work and evaluate for deficiency before jumping to a supplement.

speak with your healthcare provider before taking biotin. Biotin is a water-soluble vitamin that helps produce the protein keratin, which is essential for healthy hair, nails, and skin.