As long as you are not eating crabs that are heavily contaminated and do not eat large amounts, you can eat them with oranges.

There is now a saying that crabs contain pentavalent arsenic that is harmless to the human body. However, when pentavalent arsenic encounters the large amount of vitamin C contained in oranges, it will transform into toxic trivalent arsenic through a chemical reaction. Arsenic (arsenic is also trivalent arsenic), when trivalent arsenic reaches a certain dose, it will cause human poisoning.

Arsenic is indeed trivalent arsenic. The forms of arsenic can be divided into organic arsenic and inorganic arsenic. The toxicity of organic arsenic is relatively low. The real poison is actually its inorganic form. Inorganic arsenic mainly includes trivalent inorganic arsenic and pentavalent inorganic arsenic. Trivalent arsenic is more toxic than pentavalent arsenic.

According to my country's national food safety standards, the inorganic arsenic content in aquatic animals and their products (except fish and their products) shall not exceed 0.5mg/kg, such as shrimps and crabs, while fish and their products Must not exceed 0.1mg/kg.

Generally speaking, crabs may indeed contain varying degrees of arsenic due to water pollution, but most of them are organic arsenic, and the inorganic arsenic content is far less than 0.5mg/kg.

For healthy adults, the oral lethal dose of arsenic is approximately 100 to 300mg. Calculated based on 100mg of arsenic, the arsenic element contained in it is 75mg. Assuming that all the crabs eaten were highly contaminated crabs that reached the upper limit of inorganic arsenic content, then one would need to eat a full 150 kilograms of crabs to "guarantee" death by arsenic poisoning.

Extended information

Taboos

1. Pregnant women should not eat crabs, and they should not eat crabs throughout pregnancy. If you breastfeed your baby during confinement, it may also affect your baby. Pregnant women with habitual miscarriages should be more contraindicated.

2. Crabs are rich in protein and contain high cholesterol and purine. Gout patients should exercise self-control when eating them. People suffering from colds, hepatitis, and cardiovascular diseases should not eat crabs. China has a tradition of eating river crabs around the Mid-Autumn Festival. Traditional Chinese medicine believes that crabs are cold in nature, so ginger jelly, perilla and other seasonings used to prepare crabs are often used.

Nutritional analysis

Crabs are rich in protein and trace elements, which have a good nourishing effect on the body. Crab contains more vitamin A, which is helpful for skin keratinization. Crabs also have anti-tuberculosis effects, and eating crabs is of great benefit to the recovery of tuberculosis.

Reference: Baidu Encyclopedia-Crab