Eating disorder predisposition toward eating disorders as a result of Mendelian inheritance. Twin studies have found a slight instances of genetic variance when considering the different criterion of both anorexia nervosa and bulimia nervosa as endophenotypes contributing to the disorders as a whole. A genetic link has been found on chromosome 1 in multiple family members of an individual with anorexia nervosa. An individual who is a first degree relative of someone who has had or currently has an eating disorder is seven to twelve times more likely to have an eating disorder themselves. Twin studies also show that at least a
Eating disorders and development added as an eating disorder diagnosis in DSM-V. Previously individuals with binge eating disorder had been classified under eating disorder not otherwise specified. Due to the recency of the diagnosis, less research is currently available on Binge Eating Disorder compared to the other categories of eating disorders. The average age of onset is reported to be 25 years. Binge eating disorder is characterized by repeated binge eating episodes. This includes: The severity is classified by the number of binge eating episodes per week. Eating disorders and development Eating disorders typically peak at specific periods in development, notably sensitive and transitional