Approximately two-thirds of American men will experience some form of hair loss by the time they turn 35, according to the American Hair Loss Association. And an estimated 50 percent of women deal with noticeable hair loss at some point, too, the Cleveland Clinic points out. Clearly, hair loss is a serious concern for men and women alike—but because there is no single cause, trying to prevent it can be a challenge.

“There are over 50 forms of hair loss, approximately 10 of which are quite common but not known to most patients,” explains Amy McMichael, MD, dermatology professor at Wake Forest Baptist Medical Center. But the good news is, no matter the root cause, there are some steps you can take to keep your hair healthy. Read on to find out how to prevent hair loss before it starts.