Sweet potato, also known as sweet potato, sweet potato, sweet potato and sweet potato, is an annual plant of convolvulaceae, which contains dietary fiber, carotene, vitamins A, B, C, E, potassium, iron, copper, selenium and calcium. With high nutritional value, it is the champion of "Top Ten Best Vegetables" selected by the World Health Organization. However, it should be noted that sweet potatoes are also exquisite to eat.

● Sweet potatoes must be steamed before eating, because the starch particles in sweet potatoes are not destroyed by high temperature and are difficult to digest.

● Sweet potato contains an oxidase, which easily produces a large amount of carbon dioxide gas in the human gastrointestinal tract. Eating too much sweet potato will make people bloat, burp and fart. Sweet potato has a high sugar content. Eating too much will stimulate gastric acid secretion and make people feel heartbroken. Because the stomach is stimulated by excessive gastric acid, the contraction is strengthened, and the gastric acid can flow back to the feeding tube, leading to acid vomiting.

When eating sweet potatoes, it is best to match a little pickles, which can effectively inhibit stomach acid.

In addition, sweet potato contains a lot of sugar, which can't be absorbed by the body for a while, and the rest is easy to ferment in the intestine, making the abdomen uncomfortable. Chinese medicine believes that people with dampness blocking the spleen and stomach, qi stagnation and blood stasis should be careful to eat sweet potatoes.

The disadvantage of sweet potato is the lack of protein and fat, but today people are rich and no longer take sweet potato as their staple food, and their lack of nutrients can be supplemented by other diets.

Special note: sweet potato should not be eaten with persimmon.

Gao, an expert from China Nutrition Society, said that sweet potatoes and persimmons should not be eaten at the same time in a short time. If there is a lot of food, they should be separated for at least five hours. If eaten at the same time, the sugar in sweet potato will ferment in the stomach, which will increase the secretion of gastric acid and precipitate and condense with tannin and pectin in persimmon to produce lumps. When the amount is serious, it can cause gastrointestinal bleeding or gastric ulcer. If you feel upset in the stomach, you must go to the hospital for gastroscopy to see if there is stomach bleeding or gastric ulcer.

When should sweet potatoes be eaten?

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.