Persimmons can't be eaten with crabs because these two foods are similar. Persimmon contains a lot of tannic acid, while crab contains a lot of protein. Eating persimmon and crab together will combine tannic acid with protein, thus producing tannic acid protein. If this substance encounters gastric acid in the stomach, it will generate indigestible substances, possibly stomach stones, and will also cause certain irritation to the stomach and intestines, which will lead to symptoms such as abdominal pain and diarrhea.

Moreover, persimmons and crabs are both cold foods, and eating them together will aggravate the coldness in the body. If menstrual women eat persimmons and crabs at the same time, it will increase menstrual blood and lead to dysmenorrhea; Eating persimmons and crabs together can also cause harm to the stomach, which can easily lead to diarrhea and abdominal pain.

There are many foods like persimmons and crabs, so we should pay more attention to them in our daily diet.

Onion can't be eaten with tofu;

Onion contains a lot of oxalic acid, and calcium in tofu combines with oxalic acid in onion to form white precipitated calcium oxalate, which makes it difficult for human body to absorb calcium. Calcium is an essential element for human body. If it is difficult to absorb calcium artificially for a long time, coupled with insufficient eating, it will lead to calcium deficiency in human body.

Watermelon can't be eaten with mutton;

Chinese medicine believes that eating watermelon after eating mutton is easy to hurt your vitality. Because mutton is sweet and hot, and watermelon is cold, it is a cold food. After eating, it not only reduces the warming effect of mutton, but also hinders the spleen and stomach. For people with yang deficiency or spleen deficiency, eating watermelon and mutton together will stimulate the stomach, which will lead to gastrointestinal disorders.