Re: For example...

 This exact info came out in a report on the news (CNN I think) last week. But there is a big distinction between anorexia and anorexia nervosa. Gina's article mentioned anorexia - which by definition is loss of appetite.

Seems with this newer research those lines are blurred. Previously, to have anorexia nervosa, one must meet four criteria:

1) Disrtorted body image
2) Underweight (disproportionate BMI)
3) Desire to be thinner
4) Loss of menses

On 2 and 4 these can fit both general anorexia and anorexia nervosa. The loss of menses is from a lack of body fat. This even occurs in woman athletes that go below a certain percentage of body fat.

Not sure how the article you post (thank you) takes those points under consideration. Perhaps finally those treating patients w A/N are gaining a better understanding of the disorder. But anorexia on its own is NOT a psychological OR a genetic disorder, rather a physical condition often brought about by illness, famine, etc.

The article did appear to be referring to anorexia nervosa since they were mentioning among other things neurotransmitters, which I have no doubt are involved in the condition.