The Effects of Biotin on Your Hair, Nails and Thyroid

Biotin may help grow strong hair and nails, but there's no definitive answer from science. Supplements may taint blood tests, so it's important to do one of two things first.

STORY AT-A-GLANCE

• Dermatologists frequently prescribe biotin for people with hair loss, despite a paucity of research proving it helps

• Biotin insufficiency is more rare than other nutritional deficiencies but it does happen, leading to hair loss, depression, loss of appetite and numbness and tingling

• Biotin is important in metabolism, having demonstrated t…