If the pentapotassium arsenic and vitamin C in shrimp are put into a test tube for detection, it can indeed produce highly toxic arsenic-like substances, but it is impossible in human body, because the arsenic content must be enough to form toxic substances, and the arsenic content in seafood is very limited, which cannot reach the number of chemical reactions with vitamin C.
Compared with test tubes, the human stomach environment is extremely complicated. How can two kinds of food suddenly transform in the stomach for such a short time? So poisoning is almost impossible in real life.
It is rumored that shrimps and crabs can't be eaten with foods containing VC. In the final analysis, they are worried about arsenic pollution in aquatic products. It should be noted that crabs are easy to cause allergies and food intolerance. But this does not mean that everyone must fast vegetables and fruits containing VC when eating crabs.
In the laboratory, vitamin C may convert pentavalent arsenic into highly toxic trivalent arsenic, but it is not easy in the diet. If you must say that you will be poisoned, eat a few kilograms of crabs with serious arsenic pollution first; After that, the dosage of vitamin C should be more than 500 mg, that is, eating more than 5 kg of tomatoes at a time may be poisoned.
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