Does eating crayfish cause heavy metal poisoning?
Now it is the season when crawfish is mass-marketed. Many businesses have started selling crayfish in large quantities. Crayfish are also known as crawfish, freshwater crayfish, and red crayfish. From the crayfish's alias, it can be known that the crayfish is a freshwater prawn, and the crayfish's overall color is dark red, and the portion of the carapace is even close to black, and the crayfish has a wedge-shaped stripe on the back of the abdomen. Crayfish grow very quickly and is highly adaptable to the environment. It is also omnivorous. It can eat aquatic insects, aquatic grasses, animal carcasses, algae, etc. Therefore, crayfish have a high economic breeding value.
Crayfish is rich in protein and is easily digested and absorbed by the human body. Crawfish also contains abundant trace elements and astaxanthin in its shrimp. Crayfish is also a food with a high nutritional value, and the crayfish has a soft flesh. , delicious, especially liked by people. The practice of crayfish is known as spicy crayfish, thirteen fragrant crayfish, garlic crayfish, etc. It makes people unable to stop eating, and they will want to continue eating. It is not a problem to eat one or two pounds. .
Some people will worry about this time. It was mentioned that crayfish have strong adaptability to the environment and can adapt to various polluted environments. Will heavy crayfish consume heavy metal poisoning?
The first thing to say is the crayfish's own detoxification function. Crayfish grow in a contaminated environment. After contaminants are ingested, the content of contaminants in crawfish does not necessarily exceed national standards. This is mainly because Because of the detoxification function of the crayfish, the crayfish can transfer the heavy metals in the body to the shell, and then continue to carry out the molting, so that the toxins are excreted, which is one of the reasons that the crayfish can survive in various polluted environments. .
Secondly, the main part of our consumption of crayfish is shrimp, and studies have shown that most of the contaminants in the crayfish, namely heavy metals and toxins, are concentrated in the viscera, shrimp and shrimp shells of crayfish, so they are consumed. When crayfish are stressed, they do not always have to eat shrimp head parts and must remove crawfish shrimp threads, and crayfish shrimp meat generally does not cause heavy metal poisoning.
After finishing the heavy metal poisoning, the following talked about the symptoms of rhabdomyolysis that are of great concern to everyone. It is said that the symptoms of rhabdomyolysis caused by the crayfish washed with shrimp powder have been caused, but this is not the case. The main ingredient is oxalic acid, oxalic acid harmful to the human body, strong acidity, will destroy the body's acid-base balance, and oxalic acid and calcium in the human body will form stones calcium oxalate, eating too much oxalic acid can cause people to produce nausea, vomiting and even have May be fatal, but it does not cause an increase in the abnormality of myoglobin, leading to rhabdomyolysis, so there is no direct relationship between shrimp powder and rhabdomyolysis, but if you add other If you have chemical substances, then you have to say something else.
The etiology of rhabdomyolysis is rather complicated. We will not introduce it here. Although the crayfish are non-toxic, the crayfish itself may contain parasites, such as larvae of paragonimiasis, etc. Therefore, it must be cooked at high temperatures. Let it be eaten after ten minutes so as to ensure that the parasites are killed. The amount of a crayfish suitable for one day is 500 grams, which is a pound.
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