Biotin improves the strength, resiliency, and thickness of hair; Iron facilitates growth by helping to form red blood cells that deliver oxygen and nutrients to hair follicles; Niacin helps to repair the DNA in hair follicle cells; Vitamin A stimulates skin cell regeneration to reduce redness and soothe the scalp; Vitamin C is a powerful antioxidant that protects hair against damaging free radicals; Vitamin E has antioxidant properties that fight free radical damage; Vitamin D and Zinc help strengthen the hair follicle structure and may even reduce hair loss