Craven said:
If she's not really fat then that's an even more stupid idea than simply being bulimic.
Get her to try the Emotional Freedom Technique (EFT). It's a relatively new form of therapy that combines some principles of Oriental medicine (like accupressure meridians) with post-industrial Western psychology ("get over it"). It is no guarantee but it has a higher success rate than other forms of psychotherapy and it's a hell of a lot faster.
Check out the website:
www.emofree.com/default.htm
There are a number of practitioners available. They do workshops in major cities but they also do phone consultations. It would help if she pays the money to download the coursebook and studies the physical tapping technique before starting a phone session. But it's not mandatory, the practitioner can instruct it over the phone.
What's important here is that she has a very common problem, but it's one that conventional healers have not had a lot of success with, and even when they do it takes a long time. This is almost certainly an emotional problem, I don't believe that physical causes of bulimia are at all common.
So it's time for her to try something new and different. EFT might not work but it doesn't have much of a down side. Side effects and breakdowns are pretty unusual, the worst thing that's likely to happen is that she'll try it and it won't work. She won't be any worse off than she started except for the money.
These people have cured things like asthma, fear of spiders, and other syndromes and phobias. IN JUST ONE SESSION! I haven't seen bulimia specifically mentioned in their literature but it seems right up their alley.
I'm as big a skeptic as anyone, trust me. I wouldn't recommend woo-woo and it took me a while to be willing to give this stuff a try. It does work for a lot of people.
Give it a try.
Good luck.