This Hair, Skin and Nails formula provides you with extra strength support you need for lustrous hair, enviable skin and strong nails. These coated caplets feature 5,000 mcg of Biotin, an important B Vitamin that supports skin and hair health, and helps promote healthy nail growth by acting at the base of the nail (the nail matrix), where nail growth begins. Revitalize yourself with Nature's Bounty Extra Strength.