Shampoos that remove DHT from the scalp include Pura D'or Organic Argan Oil, Groganics DHT Blocker Shampoo, Nioxin Cleanser Anti-DHT Shampoo, and Revivogen Anti-DHT Shampoo. DHT is a derivative of testosterone, and it is one of the main causes of hair loss in both men and women.
Scientists once believed that it was the testosterone in a person's system which resulted in the hair loss, but have since discovered it is the amount of DHT at the scalp follicles. DHT shrinks follicles, making it easier for the hair to fall out. The idea behind anti-DHT shampoo is that it will clear away DHT on the scalp, and also keep scalp pores clear. By minimizing DHT on the scalp, individuals can decrease their risk of hair loss, or, at least, reduce the amount of hair they lose.