Nioxin Hair Growth* Supplements have been formulated to support healthy hair growth and promote thicker, fuller, and resilient hair. These hair growth vitamins are designed to work alongside your existing hair care routine, providing comprehensive support from within. This supplement contains essential nutrients, vitamins, and minerals, such as biotin, zinc and iron, which are known to support healthy growing hair, skin, nails and red blood cells*(**). It works by strengthening the hair follicles, reducing breakage and promoting healthier hair growth. With regular use, you can expect to see a noticeable improvement in the overall condition and appearance of your hair.