What does biotin do for the skin?

Dr. Ellen Marmur, MD
Dermatology
Biotin is found in egg yolks, brewer's yeast, bananas, lentils, cauliflower, and salmon. This B vitamin strengthens skin, hair, and nails. (A deficiency is extremely rare because bacteria in your intestines make all the biotin you need.) A deficit can lead to hair loss or dermatitis (itchy, scaly skin). Some people swear by biotin supplements to strengthen brittle nails, but studies have not proven that it's beneficial for anyone who's not deficient in the vitamin. 
Simple Skin Beauty: Every Woman's Guide to a Lifetime of Healthy, Gorgeous Skin

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Simple Skin Beauty: Every Woman's Guide to a Lifetime of Healthy, Gorgeous Skin

What if a leading dermatologist just happened to be your best friend and you could ask her anything? DR. ELLEN MARMUR, a world-renowned New York City dermatologist, answers all your questions with...

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.