I'm kinda at a loss here. Here this woman is coming to you for advice on her hairloss and you post a reply about anorexia. I saw nothing in the original post or in penguin's that stated anything about an eating disorder. Gal_girl lost weight and has no appetite. I'm 34 years old, weigh 100 lbs, have very little appetite, and according to my Dr, am healthy just need to put on a few pounds. I have a hard time gaining and am a regular lurker on the underweights messageboard here.
Yes, hairloss is a symptom of anorexia, but don't ASSUME that someone is anorexic or bulemic just because they are thin.
As for gal_girl and penguin, I've heard alot of positive things about Nioxin and have just ordered some to try. I also take a prenatal vitamin daily and only color with ammonia free products since they are less damaging (you think hair loss is bad on it's own, combine that with early gray).