What condition involves compulsive behavior related to food intake?

The condition that involves compulsive behavior related to food intake is bulimia. This eating disorder is characterized by a cycle of binge eating followed by compensatory behaviors to prevent weight gain, such as vomiting, excessive exercise, or the use of laxatives. Individuals with bulimia often experience a lack of control over their eating during binge episodes, which is a hallmark of compulsive behavior.

In contrast, anorexia nervosa is primarily characterized by an intense fear of gaining weight and a distorted body image, leading to severe restriction of food intake, rather than compulsive ingestive behavior. Celiac disease is an autoimmune disorder triggered by the ingestion of gluten, leading to various gastrointestinal symptoms but not compulsive eating behaviors. Motion sickness affects balance and can cause nausea during certain movements but is unrelated to eating habits or compulsive behaviors. Understanding the distinct features of these conditions highlights why bulimia is the correct choice as it directly involves a compulsive cycle surrounding food intake.