A variety of seafood, such as shrimp, crabs, clams and oysters, contain the chemical element arsenic in their bodies. In general, the content is very small, but increasingly serious environmental pollution may make these animals in the body of arsenic content to reach a high level. Shrimp body contains arsenic valence is pentavalent, in general, pentavalent arsenic is not harmful to the human body. Theoretically, a high dose of vitamin C (a one-time intake of vitamin C more than 500 mg) and pentavalent arsenic after a complex chemical reaction, will be transformed into a toxic trivalent arsenic (that is, we often say, "arsenic"), when the trivalent arsenic reaches a certain dose can lead to human poisoning.

According to professionals, a one-time intake of 50 medium-sized apples or 30 pears or 10 oranges or more than 3 pounds of raw green leafy vegetables, only a large dose of intake of vitamin C. If the heating and cooking process, the food in the vitamin C will also be greatly reduced. Therefore, there is no danger in consuming fruits or green vegetables along with seafood, as long as they do not exceed the amount mentioned above. Metallic elements are easily deposited in the head of seafood, so try not to eat the head of shrimp or fish. Baidu know