Crab belongs to a kind of soft-shell food. This food contains a certain amount of arsenic. As long as it is with vitamin C, a certain chemical reaction will occur, and eating it often will damage the liver. So when eating crabs, you can't eat them with kiwis, grapes, tomatoes and oranges.
3. Crabs contain a lot of high protein, and they are all high-quality protein. If eaten with some fruits containing tannic acid, it will form a certain reaction in the body, making the gastrointestinal tract indigestible. Eating too much is particularly easy to cause stomach stones, so crabs can't be eaten with persimmons, apples and grapes.
Extended knowledge
Crab is a crustacean, its body is protected by a hard shell, and it breathes through its gills. Taxonomically, it is the same kind of animal as shrimp, lobster and hermit crab. Most kinds of crabs live in the ocean or offshore areas, and some live in fresh water or land. They rely on the mother crab to give birth to small crabs, and every time the mother crab will lay a large number of eggs, the number can reach more than one million.
Although this kind of food is very nutritious, you should pay attention to the method when eating, not everyone can eat it. For example, pregnant women or allergic people can't eat it.