2. The calorie of sweet potato per 100g is about 89 calories. If you use sweet potato instead of rice, because sweet potato is rich in dietary fiber and starch, you will feel fuller. Compared with eating rice at ordinary times, it will consume less, but the feeling of fullness is the same, but on the basis of satiety, the natural calories will be relatively reduced because of eating less. At the same time, the dietary fiber and pectin contained in sweet potato can promote gastrointestinal peristalsis, speed up defecation, help food digestion and fat metabolism, and help to lose weight. However, sweet potato has a high sugar content, so it is not suitable to eat more, or adopt a high-calorie eating method such as frying and adding sugar, otherwise it will insist on eating sweet potato for one month without losing weight.