You are an aggressive, highly sexed, macho male, pumping testosterone throughout your body. You may be proud of your muscles, of your sexual drive, your testosterone-filled body. Yet the very thing that makes you a big strong sexual male can also make you bald. And to add insult to injury – the more hair you lose on your head, the more hair you will grow in your ears, nose, upper back, and shoulders. The first signs that testosterone is linked to male pattern baldness were the eunuchs, who unlike their uncut male friends, never lost any hair. Fifteenth century castrati in the Italian opera always had a full head of hair. So did all soldiers whose battlefield injury happened to include any harm to the testosterone and DHT manufacturing center – the testes. But the hormonal link in balding is complex. Eunuchs, who produce no testosterone, never go bald even if they have a ba raspberry ketone ldness gene. However, if castrated men with a family history of baldness are given testosterone, they lose hair in the classic horseshoe-shaped pattern. So how does the testosterone affect the male pattern baldness? Normally the scalp loses roughly 100 hairs a day and sprouts 100 new ones. But the sex hormone testosterone can upset this break-even dynamic. Testosterone, in the form of DHT, or dihydrotestosterone stimulates hair growth on the face and the body. But in men who carry a certain common gene, the same hormone gradually defoliates the scalp, causing their aging heads to grow shiny even as their ears, noses and shoulders sprout more hair. Scalp hair loss is influenced by the transformation of testosterone into dihydrotestosterone (DHT). If there is already a hereditary tendency for hair loss, chances are, the scalp hair will thin and lead to male pattern baldness.