100 grams of boiled groundnut calories for 99 kcal, per 100 grams of fresh sweet potatoes contain only 0.2 grams of fat, producing 99 kcal of caloric energy, roughly 1/3 of the rice, so it is a very good low-fat, low-calorie food, if it is used as a staple food, you can effectively reduce the amount of other food intake, which in turn achieves weight loss results. Sweet potato contains a large amount of dietary fiber, in the intestine can not be digested and absorbed, can stimulate the intestinal tract, enhance peristalsis, laxative detoxification.