Eating Disorders and Diabetes.

This review describes the characteristics of patients with eating disorders in both type 1 and type 2 diabetes and the principles of their treatment. The combination of type 1 diabetes and an eating disorder is sometimes known as “diabulimia”. The hallmark of the condition is that the patient deliberately takes an inadequate amount of insulin in order control their body weight (insulin restriction). Other disordered eating behaviours, such as dietary restriction, self-induced vomiting and binge eating, may also be present but typical anorexia nervosa is rare. There is an increased prevalence of eating disorders in adolescents with type 1 diabetes, which is estimated at 7%. The combination of type 1 diabetes and an eating disorder leads to elevated levels of HbA1c and an increased risk of both acute and chronic complications. Screening is recommended but rarely carried out. Management requires an understanding of the inter-relationships between eating behaviour, mood, blood glucose and insulin administration. Treatment aims to introduce a regular eating pattern and support the patient to increase their insulin dose gradually. Eating disorders also occur in those with type 2 diabetes, where binge eating disorder is the most common diagnosis. Eating disorders are common in both type 1 and type 2 diabetes, with an increased prevalence of complications in type 1. Treatment requires an understanding of both diabetes and eating behaviour.