Not easy to obese for many reasons, often consider the following factors: 1, personal physique, some people are not easy to obese physique, this is related to genetics, genes, such people have a characteristic, parents or grandparents are not easy to grow fat; 2, gastrointestinal tract disorders, cause gastrointestinal tract dysfunction is often related to some organic diseases, such as chronic gastritis, gastric ulcer, these gastrointestinal diseases will affect Affect the absorption of nutrients, the body is not easy to gain weight due to lack of nutrients; 3, endocrine diseases, when suffering from hyperthyroidism or diabetes patients are not easy to gain weight, with the progress of the disease and even the situation of thinning. Mainly because of hyperthyroidism when the body’s metabolism accelerates, fat metabolism capacity increases, for diabetic patients is mainly due to insufficient insulin secretion, affecting the conversion of glucose. When you find you can’t grow fat you can go to the hospital for a checkup to further find the cause of the disease and then carry out targeted treatment.