Actually, when I first started dealing with the SA issue back in late 1995 -1996, I had a mild - moderate nervous breakdown. An ED emerged out of it. I lost somewhere between 20 - 25 within a few weeks. I've always been kind of tall thin anyway, so was really noticeable, and unhealthy.
I started in counseling about the SA issues, not the ED. Once I got started, I started to eventually eat properly again. The ED was a symptom of what was really wrong with me. I eventually put on a few pounds. I hope that helps.