What to do if your friend is bulimic?

Answer 1

Tell her parents. I know she probably swore you to secrecy and will get mad if you tell, but you have too. Eating disorders are a really serious disease that could lead to death. She might get mad at you now, but in the end you'll be saving her life and it will be worth it. Please tell her parents so they can get the help that she needs!

Answer 2

I am afraid that you can't do anything to stop her/him from being bulimic because it's a mental state of mind and only them can control it. However you can do as much as you can to encourage her/him that their body image is fine, they don't need to do it, tell them that you are always there for them and that you'll be with them through thick and thin. Also you could try and research the consequences* of bulimia and show them maybe that could slowly bring it to a hault, but like I said... You will not be able to surely convince them to stop.

* a quick contradiction, telling them the consequences doesn't usually work. They often feel that it won't happen too them or that you are under-educated.