Officially, Reviva Hair. The hair loss product that has been proven to be effective in a double binded study done in South Africa which included *0 males and *0 females, *5.6 percent success rate ( please request more infor regarding study). Reviva Hair is the only known hair loss product that that been scientefically formulated to stop hair loss on all known levels. Not only do the ingredients include proven DHT blockers ( DHT is the main culprir regarding the hair loss proccess) but also improves blood circulation to the hair follicle and equips the improved blood circulation with those internationally renouned hair nutrients ensuring new health, stronger hair growth.