Dihydrotestosterone (DHT), a derivative of the male hormone testosterone, is the enemy of hair follicles on your head. Simply put, under certain conditions DHT wants those follicles dead, meaning if you have the gene that allows your hair follicles to be susceptible to attack from DHT, you will suffer from MPB
Testosterone converts to DHT with the aid of the enzyme Type II 5-alpha-reductase, which is held in a hair follicle’s oil glands. Scientists now believe that it’s not the amount of circulating testosterone that’s the problem but the level of DHT binding to receptors in scalp follicles. DHT shrinks hair follicles, making it impossible for healthy hair to survive, they are literally choked until they become so small they can no longer produce a hair.