I walked in on my friend throwing up. I knew she wasn't sick. She tried a bunch of excuses but eventually confessed that she was "emptying her stomach." As a concerned friend I started spitting out all the health class stuff I had learned about eating disorders. She told me it wasn't really that bad. She said she only does it three or four times a week right after big meals. She had an answer for everything I said and insisted she was healthy. Her little method of eating part of a banana, drinking a big glass of water, brushing her teeth after each time and taking vitamins refuted much of my health class stuff. Then I asked her if she was worried about getting cancer and she told me that was total BS and said I should google it. I did and she was right. I felt like I got destroyed in a debate where I should have been the easy winner. I don't know what to do now. Part of me is wondering if she is really right. Maybe there is no need to worry. I don't know.