The causes of human obesity are caused by many factors. There are genetic factors, personal eating habits (eating too many high-calorie foods, high-fat foods, poor sleep quality or eating snacks before going to bed (low metabolism but good absorption during sleep), and physical health reasons (such as eating central nervous system disorders and abnormal hormones). Obesity has been defined as a disease by the World Health Organization. Obesity can lead to many diseases in the body, such as cardiovascular disease, hypertension, diabetes and so on.

Purple sweet potato is a kind of low-fat food, which contains more than ten kinds of trace elements such as vitamin A, vitamin B, vitamin C, potassium, pectin, linoleic acid and a lot of dietary fiber. Therefore, purple potato is beneficial to stimulate defecation and detoxification. Using purple potato instead of other staple foods will have a certain weight loss effect. You can't lose weight if you eat too much. Purple sweet potato is easy to produce gas during digestion, which can easily lead to abdominal distension and hinder sleep quality. Starch in purple sweet potato will be converted into maltose during chewing and digestion, and then from maltose to monosaccharide, and monosaccharide is more easily converted into fat. Then eating too much purple potato will produce too much fat, but it will not lose weight, and it will gain a lot of weight. If you want to eat purple potato to lose weight, you can't achieve obvious weight loss effect only at night. Eating purple potatoes in the morning and afternoon is the best way to lose weight.