DHT is thought to cause hair follicles to shrink, contributing to male pattern hair loss. It has also been linked to hair loss in women. DHT is a derivative of testosterone and considered to be the enemy of hair follicles on your head as, under certain conditions, DHT works to kill hair follicles. This simple action is the cause of many kinds of hair loss. To remedy this, here are the top 7 DHT Blocker Shampoos that stop hair loss: