When Penn State University kicker Joey Julius came forward as having an eating disorder last fall, he shed light on what so many teens already know through painful personal experience: These complex mental illnesses strike people of both sexes and of every shape and size. “There are a lot of myths out there,” says Claire Mysko, head of the National Eating Disorder Association (NEDA).

When you see harassment happen, you can’t just assume someone else will step in. But how can you safely enter a menacing situation? Great news: Being a hero is not as scary as it seems.