Crab is rich in protein, vitamins and substances such as selenium, calcium, phosphorus and iron. When eating crab, it is important to note that crab meat is cold and should not be eaten in excess. In some cases, it is not recommended to eat crab with some fruits, the common forbidden fruits are as follows: 1. Crab meat is rich in protein, and tannic acid may coagulate with stomach acid or protein, generating precipitate tannin, which may not be easy to digest after consuming large amounts, and may have certain adverse effects on people with poor gastrointestinal function. 2. Cold fruits: such as pear, melon, watermelon, banana, kiwi, etc. These fruits and crab are both cold in nature, and may damage the spleen and stomach when consumed in large amounts, especially for people with poor spleen and stomach function, who are prone to abdominal pain after consuming cold foods. The same food may cause or aggravate the discomfort, especially for those who have poor spleen and stomach function and are prone to abdominal pain and diarrhea after eating cold food. In addition, some people believe that crab cannot be eaten with vitamin-containing food and will cause poisoning, but there is no scientific basis for this, part of the explanation is that seafood contains arsenic, which reacts with vitamin C to produce highly toxic arsenic, but in fact, seafood is mostly stable organic arsenic, which does not react, and a few traces of inorganic arsenic will soon be metabolized, so even if you consume more of it every day, it will not cause any effect. The basic effect is not even if you consume more. There are no many contraindications to eating the same food, so you should not overly believe the rumors that cause concern.