Propecia: Uses, Dosage, Side Effects, and Considerations
DHT is a derivative of the male hormone testosterone, which signals to the hair follicle to undergo miniaturization,” hair transplant surgeon at Ziering Medical, Dr. Rae Lynn Kinler, explains. “Over time, this leads to a finer, thinner, lighter hair shaft, which progressively gets smaller until the follicle no longer produces a hair shaft.