Chestnut is a kind of nut food, which is rich in protein. It is not recommended to eat high-protein foods with foods rich in tannic acid. If they are eaten together, protein in chestnut will have a complex reaction with tannic acid, and the generated substances are difficult to digest and absorb, which will increase the digestive burden. After some people with poor digestive function eat it, it is easy to absorb incomplete nutrition and reduce the nutritional value of chestnut. Foods rich in tannic acid include persimmon, raw banana, raw fig, raw kiwi fruit, bamboo shoots, jujube, pomegranate peel, Toona sinensis and so on.

Chestnut contains carbohydrates, protein, dietary fiber and other nutrients. Eating chestnut is good for your health, but these ingredients are not easy to digest. Eating too much will increase the burden of digestion, and eating some indigestible food will increase the burden on the body, which will lead to physical discomfort such as indigestion. The indigestible foods are: pig's trotters, fat pork, pork belly, Dongpo meat, cooked meat, pot-wrapped meat, cakes and so on.