Page 1 of 2 Most men experience hair loss in their lives, but the severity and speed change from one person to the next. Regardless of age, if your hairline isn't what it used to be, you're probably wondering "what now?" From styling and care to treatment and prevention, here are a few things to know about your new reality. The Science Behind It "If you're seeing less and less hair, you may be experiencing androgenetic alopecia, which is male inherited balding," says Jonathon Graff, Director of Clinical Research & Education of Apira Science. "This is the most common cause of hair loss in men and is usually characterized by a receding hair line, loss in the crown or 'bald spot,' or general thinning hair throughout the top of the head. Men generally begin to experience androgenic alopecia in their early 20s, although it can take years before becoming noticeable." Hair loss is caused by genetics and hormones — usuall