Firenze Professional Anti-Hair loss Shampoo 10.1oz- The Prunus Africana extract contained in this shampoo inhibits the production of the (5 alfa reductase enzyme on the scalp that is the culprit for hair becoming thinner) thus allowing hair follicles to grow thicker which in turn reduces hair loss. This product is indicated for the treatment of androgenic alopecia. Allow two to three weeks of constant use in order to notice results. Directions for use Slowly massage a small amount into wet hair and scalp. Rinse thoroughly. Firenze Professional Anti-Hair loss Conditioner 10.1oz :The Prunus Africana extract contained in this shampoo inhibits the production of the (5 alfa reductase enzyme on the scalp that is the culprit for hair becoming thinner) thus allowing hair follicles to grow thicker which in turn reduces hair loss. Human use this conditioner as a rinse off product and you may you also leave it on, which will allow the active ingredients to remain longer on the scalp and hair shaft, thus achieving better results. Directions for you : after using AHL shampoo, apply on your hair a small amount of AHL conditioner and rinse thoroughly.