Question: Britney is a 16-year-old female who is referred to your clinic by her dietician. For the past year, she has felt it hard to control her eating habits and often eats more within a short period of time than others would eat. She hides her eating by ordering take out or going to drive thru windows alone. She will eat food and hide the wrappers. She has begun to use laxatives at least twice a week along with purging to maintain an acceptable weight. She also exercises for at least 60 minutes every day. What is her most likely diagnosis?