Every100g of fresh sweet potato contains only 0.2g of fat, which generates 99 kilocalories of heat energy, which is about 1/3 of that of rice. It is a good food with low fat and low heat energy, and it can effectively prevent sugar from transforming into fat, which is conducive to weight loss and bodybuilding. Sweet potato contains a lot of dietary fiber, which cannot be digested and absorbed in the intestine. It can stimulate intestinal tract, enhance peristalsis, relieve constipation and detoxify, especially for senile constipation.

Eating sweet potatoes all day can reduce weight, but it will cause malnutrition. Sweet potato lacks protein and lipids, so it should be eaten with vegetables, fruits and protein foods to avoid nutritional imbalance. Most importantly, sweet potatoes are best eaten at the prime time of lunch. This is because after we eat sweet potatoes, the calcium contained in them needs to be absorbed in the human body for 4 to 5 hours, and the afternoon sunshine can just promote the absorption of calcium. In this case, eating sweet potatoes for lunch can completely absorb calcium before dinner, and it will not affect the absorption of calcium in other foods at dinner.