Always eat fat is caused by a number of reasons: first, genetic factors, each person’s physique is different, the body can digest fat enzyme distribution is not the same, there are more and less, the distribution of proportional is proportional body shape, distribution of less is fat, distribution of more is thin. Second, people’s basal metabolism is not the same, the basal metabolism is large to consume more calories, the basal metabolism is small to consume less calories, fat is easy to store. Third, dietary factors, diet more carbohydrates easy to grow fat, low calorie food containing less carbohydrates, eat more is not easy to grow fat. Fourth, consider the absorption capacity, strong absorption capacity is easy to gain weight, poor absorption capacity of people are more thin. Fifth, consider whether there are other diseases, such as diabetes and tumors and other patients are easy to lose weight.