Anorexia nervosa is a disease in which a person drastically limits their calorie intake to virtually zero as a method of weight control. They often see themselves in a distorted and heavy version, in addition to the fear of gaining weight. Those living with anorexia develop eating rituals along with excessive exercise. Their personality consists of being rigid, anxious, perfectionistic and obsessed with order. The key word, in my opinion, is perfectionist, you set high standards that it literally becomes an obsession to maintain that standard like a limited diet. This may be related to a high sense of self-efficacy as they believe they are capable of maintaining standards set by themselves. However, I believe they may also have a weak sense of self-efficacy as they anticipate the fear of gaining weight. This view of what they would consider the worst fear is similar to how the cognitive process of self-efficacy is invoked. Personally, I believe that anorexia nervosa may be associated with a combination of both strong and weak self-efficacy, but there appears to be no research to support this theory. Perhaps this could be a possible area of ​​future research in the diagnosis of nutrition