Yahoo!: How to Take Care of Thinning Hair
Hair loss is a major problem for men and women across the globe. In fact, according to a 2014 survey by the International Society of Hair Restoration Surgery, as many as 320 million people in the United States—that's more than one in five Americans—suffer from hair loss, and not all of them are classified as "elderly." There are many reasons why a person can start losing his or her hair. The most common cause, however, is androgenic alopecia, also known as male or female pattern baldness, notes Andrew Fitzsimons, a celebrity hairstylist and the NatureLab Tokyo brand ambassador. "Androgenic alopecia is hereditary, so some people are simply more prone to hair loss than others," he says. "Other causes of hair thinning include serious disease, extreme stress, traction alopecia (caused by tight hairstyles that stress the follicles—think braids and tight ponytails), adverse reactions to certain medications, and even stressful events, like childbirth."