Eat less instead of fat may be caused by bad eating habits, there may be less exercise or low basal metabolism and other reasons. 1. Bad eating habits: If you usually have bad eating habits, such as often eat high-fat, high-sugar, high-calorie food, although eating less, but the intake of calories will be more, thus making the body fat. 2. Less exercise: some people eat less, but due to less exercise, the intake of calories did not consume in a timely manner, will also be converted to fat accumulation, thus making the body fat. 3. Low basal metabolism: If their own basal metabolism is relatively low, the intake of calories can not be consumed, it is also easy to lead to the body fat. For example, hypothyroidism patients, easy to eat less but fat. Eat less instead of fat, it is recommended to regular hospitals for relevant examinations, to rule out pathological conditions, if necessary, under the guidance of the doctor to use the appropriate program, usually a small number of meals, do not overeat, but also more physical exercise, pay attention to the diet of balanced nutrition, etc., is beneficial to health.