22 Jen has always been a picky eater. But her mom started to notice that during meals she was simply moving food around her plate and not eating very much. Jen also exercised all the time-even when...

Jen has always been a picky eater. But her mom started to notice that during meals she was simply moving food around her plate and not eating very much. Jen also exercised all the time-even when she was sick. And she was sick a lot. Jen's hair started thinning and she also became moody and sad. What disorder could Jen be struggling with?