Many studies have shown that fat people do not eat more than thin people. In some cases, fat people actually eat less than thin people. This contradicts the assumption that all fat people are compulsive overeaters or have some other abnormal eating pattern. Largeness is one variation of human size rather than an indication of unhealthy eating patterns. There is little evidence that personality or happiness is directly related to weight.
Psychological tests show no significant difference between fat and thin people.
There is no fat personality just as there is no thin personality or short personality. Psychological interventions have been no more successful than commercial diet programs in helping people achieve permanent weight loss. Diets don't work. This change of position on dieting was the result of new insight into set-point theory and extensive research on the effects of dieting. Studies have shown that each person's body has a natural weight and that all people, fat or thin, adjust their metabolism to maintain that weight.