Healthy Hair Growth Supplements may combat hair loss with DHT inhibiting botanicals plus Biotin, Niacin and Zinc for thicker, fuller looking hair. Biotin helps strengthen the hair follicle while Niacin and Zinc maintain healthy hair and reduce shedding. L-lysine in the Women's Healthy Hair Supplements helps the body absorb iron from food, nourishing hair follicles and encouraging growth. May also improve the appearance of skin and nails.