Male pattern hair loss (androgenetic alopecia) is the most common cause of hair loss in men. Almost half of all men over the age of 50 are affected. This is about 50 million men and 30 million wome…

Topical minoxidil is available over the counter and is used to treat hair loss. Minoxidil was initially developed to treat ulcers, but it was not effective. The Food and Drug Administration (FDA) a…