Dietary Supplement. Biotin is an important nutrient for healthy hair , nails, and skin. Studies show that for those who are biotin deficient, biotin may help in the health of hair, skin & nails. Biotin also supports healthy carbohydrate, protein & fat metabolism. No artificial flavors. No preservatives. No yeast, starch or gluten. These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.