I have personal experience with eating disorders. A family that goes to the same church as I do had a daughter with an eating disorder. They were all fat, she was the opposite. Fortunately the community was supportive and she recovered eventually, but for about eight months we watched her waste away bit by bit. Her periods stopped, her face became skeletal, etc. She wore extremely thick clothing to try and cover it up, but when she wore sandals you could see the outline of even the smallest bones in her feet, and her fingers looked like white noodles. Basically, it was a really horrifying thing to witness.
Her case was the result of being the youngest member of a huge family and being used as unpaid labour in their fast food restaurant. Her schedule was dictated 24/7 by her parents and siblings with no room for self-expression. So she rebelled in the only way she could; by starving herself. She recovered fully only when she was able to move out and express some personal independence.
Point being; eating disorders almost always arise from deeply troubled family situations. They are a symptom, not a disease. I can't help but wonder what screwed up Canuk bullshit Clara went through as a child to do this to her.