DHT stands for Dihydrotestosterone. It’s a by-product of the male hormone called testosterone. Hair loss in vast majority of men is caused by DHT alone.
Testosterone converts to DHT with the aid of an enzyme called 5-alpha-reductase. The DHT is then induced into the blood and flows to all the parts of the body including your head scalp. The process of testosterone converting to DHT is not abnormal and happens in every man. However, it creates problems in those men who are genetically sensitive to DHT. In such men, DHT causes hair loss and eventually makes all the hair, whose hair follicles are affected by DHT, disappear.