For friends who love crayfish, on a hot summer day, about three or five friends drink a few bottles of cold beer with a plate of bright red and spicy crayfish. This is really a great pleasure in life. However, there have been many arguments against eating crayfish in the past two years. Crayfish contains a lot of heavy metals? Crayfish causes myolysis? All kinds of stories are going viral on the Internet. But what is the truth? Listen to the opinions of experts.
Where is the origin of lobster?
The scientific name of crayfish is Procambarus clarkii, also known as red crayfish or freshwater crayfish. The origin is Louisiana, USA, and then in 19 18, Japan introduced crayfish from the United States as bait for raising bullfrogs. During World War II, crayfish was introduced into China from Japan, and now it has become an important freshwater shrimp resource in China, widely distributed in the middle and lower reaches of the Yangtze River.
How many times does the heavy metal in lobster exceed the standard?
Judging whether crayfish is polluted by heavy metals such as lead, mercury, manganese, chromium and arsenic mainly depends on whether the environment in which it grows meets the national agricultural product safety standards, including the pond water quality and whether non-edible food additives are added. Crayfish itself will not produce pollution.
Foreigners don't eat crayfish?
According to FAO statistics, the annual global trade volume of crayfish is as high as 300,000 tons. In the hometown of American crayfish, crayfish have been eaten as early as 200 years ago, and the number is very large. There are also many markets that specialize in selling crayfish, which are also eaten in European countries, but Japanese people don't like it because they think crayfish meat is firewood and doesn't circulate on the Internet, because crayfish is harmful to health and other reasons.
Authoritative expert analysis: the nutritional value of crayfish is very high!
Crayfish is rich in protein, and its meat is soft and easy to be digested and absorbed by human body. It is very good food for people who are weak and need to be nursed back to health after illness. In addition, shrimp meat is rich in magnesium, zinc, iodine, selenium and other elements. These nutrients have a good regulation and protection effect on the cardiovascular system, which can reduce the cholesterol content in blood, prevent arteriosclerosis and dilate coronary arteries. Japanese scientists have found that astaxanthin contained in crayfish is a strong antioxidant, which can eliminate the adverse reactions caused by jet lag. Therefore, after returning from overseas travel, jet lag leads to discomfort, so it is better to come to crayfish to relieve symptoms. In addition, crayfish can also be used as medicine, which has the functions of resolving phlegm, relieving cough and promoting wound healing.
Expert reminder: how to do it?
1. Look at the shrimp tongs: The smooth-looking crayfish is probably washed with shrimp powder. However, crayfish shrimp tongs corroded by washed shrimp powder are easy to fall off. Therefore, crayfish on the table should be carefully eaten if the shrimp tongs fall off seriously.
2, look at the shrimp body: the back is bright and clean, and the hair in the belly fluff and other parts is very white and neat. It is usually raised in clear water and can be safely eaten.
3, look at the shrimp shell: the shrimp shell is red and black or red with iron blue. And the hard shell of shrimp is mostly old lobster that has lived for a long time. Shrimp shells are bright and tender lobsters are elastic. It is recommended to choose tender lobster to eat.
4, look at the shrimp tail: crayfish cooked in the restaurant, if the shrimp tail is curly, it means that the shrimp before cooking is alive. If the shrimp's tail is straight, it means that the shrimp died before cooking. Dead shrimp can't be eaten, which may lead to lead poisoning.