Because red crabs have a special kind of toxic formic acid in their body, which can cause damage to the mucous membrane of human intestines if consumed.

Red crabs can't be eaten because there is a special kind of toxic anthranilic acid in the body of red crabs, and if you consume red crabs, the toxic anthranilic acid will attack the human body, which will cause damage to the mucous membranes of human intestines.

However, even if this is the case, in checking the information found that the world can eat seafood list, there is the name of the Australian red crab, which shows that the red crab can be eaten, and the taste is not bad, there must be some kind of method to remove the toxic anthranilic acid in the body of the red crab, just that this method has not yet reached the point where it can be widely promoted.

Crab eating taboo:

Crab meat is mainly composed of protein, but also contains calcium, phosphorus, iron and vitamin A and so on. Therefore not only flavorful, but also nutritious. But if you eat with fruit, it is easy to combine with the ellagic acid contained in the fruit to form ellagic acid protein.

It is not easy to digest, aggravate the burden on the stomach and intestines, there will be diarrhea and other symptoms. Therefore, after eating crabs do not eat fruit immediately, especially persimmons and other fruits containing high tannins.

Crab is cold food, itself easy to cause diarrhea, and yogurt is rich in lactobacilli, there is to accelerate the role of gastrointestinal peristalsis, therefore, yogurt and crab at the same time to eat, especially for the spleen and stomach cold people more prone to diarrhea.