History of Eating Disorders

It thought it was interesting how all the articles that we read discussed holy anorexics from the 1700's, and then the modern anorexics from the 1900's. However, there was a big gap in time between the two types of anorexics. It was never explained how the cultural change created the shift from holy anorexics to modern anorexics. I found the following article:

http://www.randomhistory.com/2008/08/08_eating.html

But even in this, the 1800's seemed to be excluded from the history of anorexia.