GNC Biotin 5000 mcg: Supports Healthy Hair, Skin & Nails* GNC Biotin 5000mcg is a supplement that provides a vitamin important to the development and maintenance of healthy skin, nails and hair. Natural sources of the nutrient include liver and other meats, milk and eggs. The body uses it to help energy metabolism. GNC biotin supplement may help address the symptoms of biotin deficiency. Supports healthy skin, nails and hair Helps prevent biotin deficiency Manufactured without gluten, soy, yeast or dairy products These statements have not been evaluated by the Food & Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.