A feminist take on anorexia: it is a "disease" of choice, where girls/women believe that they are not good enough, for whatever reasons. The reasons may be society-at-large, the media, their religion/culture, or their particular family dynamics. Anorexia is a way of controlling one's body, in a situation where the person feels they don't have much control in anything else.

As such, I'd expect that anorexia rates are higher in abusive families, and in families/cultures where women are considered 2nd class or subservient to men. It's about the woman taking control in any way she can, even if that way is destructive. She's destructive because she already feels destroyed (whether that feeling is justified or not.)

It also ties in with an unhealthy competitiveness -- where the fewer choices one has, the more important "success" in these choices becomes.

Just my observation, and it doesn't solve anything. Dancer, your kindness and care for this young woman shines through.