Please read the following as it mentions some differences between substance abuse and eating disorders.
Differences between eating disorders and substance abuse
Differences that exist between the two disorders must focus, of course, on the fact that eating disorders are gender specific for females, particularly, teens, while substance abuse covers all gender age, race and income level. Another difference is reflected in at-risk populations. While recent indications note an increasing diversity in age, race, and sex, in the eating disorders community, the primary sufferer still is a young woman (Centers for Disease Control and Prevention, 2002). Another difference is reflected in the approach/avoidance relationship. The substance abuser positions herself to always be in "search of the substance. Fueled by cravings, the user moves toward the substance whereas the person with the eating disorder is constantly seeking to avoid food at all costs. The process of ...
This solution compares and contrasts the two most common eating disorders among teenagers. It also describes how substance abuse relates to eating disorders.