1. You can't eat a lot of vitamin C at the same time when eating shrimps and crabs.
Because crustacean seafood such as shrimps and crabs contain high concentrations of pentavalent arsenic compounds, which are harmless to human body, but if a large amount of vitamin C is taken at the same time, pentavalent arsenic will be reduced to trivalent arsenic, namely arsenic trioxide, commonly known as arsenic, which will lead to acute arsenic poisoning and even life-threatening in severe cases.
Don't mix seafood with fruit.
Because seafood contains high protein, calcium, phosphorus and other nutrients, if it is eaten together with foods with high tannic acid content, it will not only reduce the nutritional components of seafood, but also combine calcium in seafood with tannic acid to form a indigestible substance, which will lead to vomiting, dizziness, nausea, abdominal pain and other symptoms. Therefore, fruits with more tannic acid such as tea, persimmon, grape, pomegranate and hawthorn should not be eaten with seafood at least two hours apart.
Shrimp+Lemon Folklore: Eating "Lemon Shrimp", a famous Thai dish, will lead to poisoning, because vitamin C in lemon will turn pentavalent arsenic, a metal contained in shrimp, into toxic trivalent arsenic, which is commonly used to poison people in China costume dramas. The fact is that this kind of violent chemical reaction can only happen in the laboratory. Except shrimp, crab, lobster and shellfish (clams, oysters, etc. ) all contain arsenic. Theoretically, high doses of vitamin C and pentavalent arsenic will indeed be converted into toxic trivalent arsenic by chemical catalysis. But in our general diet, it is impossible to eat a very large amount of shrimp at a time, and at most one lemon is used for seasoning, so the content of vitamin C should not be too much. It's an exaggeration to say that eating a plate of lemon shrimp may lead to poisoning. In addition, in the cooking process, vitamin C may have been destroyed, and the ability to convert pentavalent arsenic into trivalent arsenic will be lost. How to eat is better: there is no problem in taking vitamin C from natural food, but be careful not to eat too many large doses of vitamin C tablets without authorization. In addition, metals tend to accumulate on the heads of seafood, so try not to eat shrimp heads and fish heads.