Biotin, a vitamin B7 nutritional supplement, is available from Nutrition Planet to help you grow and maintain healthy hair, skin, and nails. Nutrition Planet Biotin offers 10,000mcg of biotin in each caplet for strong, thick, and lustrous hair and nails. Because biotin is a water-soluble vitamin that can't be stored in the body, it's important to take it on a regular basis to keep your biotin levels up. It may aid in the reduction of nail brittleness and the promotion of healthy skin cell formation.It is an essential vitamin for maintaining healthy hair, nails, and skin