China has a long history of eating crab. There is a folk saying that "a plate of crab is the top dish". It is not only delicious, but also rich in nutrition. It is a high-protein supplement. Autumn is the best time to eat crabs. There has always been a saying that "when the west wind blows, crab legs are itchy, and crab roe is eaten in golden autumn". Regarding crab, what nutritional value does it have, and what should be paid attention to when eating crab? How to choose it?Promotes wound healing
Crabs are rich in protein and cholesterol, vitamin A, vitamin B, vitamin E and a large amount of trace elements selenium and other nutrients, which have many benefits to the human body. The protein and vitamins contained in crabs are beneficial to human skin, especially for the healing of human wounds to a certain extent.
Crabs also have the effect of enhancing immunity. Protein and selenium elements can provide raw materials for human immune cells to engulf "foreign objects" that invade the human body, and secrete antibodies to improve the immune system of the human body. Crabs are rich in the mineral elements calcium and magnesium, which can supplement calcium for the human body. Magnesium plays an important role in the normal functioning of nerves and muscles and the conversion of blood sugar. Crabs also have anti-tuberculosis effects, and eating crabs is of great help to the recovery of tuberculosis.
Raw and dead crabs cannot be eaten
Crabs should be eaten fresh, dead crabs should not be eaten. Crabs have a lot of histidine in their bodies. Once they die, various bacteria will multiply in the crabs, prompting histidine to produce histamine, which is toxic and harmful to the human body. As the time of death increases, the more histamine becomes available, the more toxic it becomes.
Crabs should be steamed and cooked thoroughly, and raw crabs should not be eaten. Because crabs like to eat rotten animals and various small creatures, their parts contain more germs and various pathogenic microorganisms. Don't take chances, it must be cooked before eating.
Four parts of crabs cannot be eaten: crab gills, crab heart, crab stomach, and crab intestines. The intestines and stomach belong to the digestive tract, and the gills are the respiratory organs, which are easy to accumulate dirt; the crab heart, as the internal organs of the circulatory system, can easily cause allergies and diarrhea after eating.
Crabs are delicious, but don't eat too much. Crab is a food with high protein, high purine and high cholesterol. According to the recommendation of my country's dietary guidelines, the appropriate amount of aquatic products per day is 75 to 100 grams. Converted to crabs, it is probably that healthy people can eat 2 crabs a day. .
Crabs are high in cholesterol, especially crab roe. It is recommended that patients with cardiovascular and cerebrovascular diseases eat crab meat in moderation and eat less crab roe.
Four Steps to Buying Crabs
Look. The carapace of the high-quality crab is blue-gray, shiny, the abdomen is white, the golden claws are clustered with yellow hair, the color is bright, the umbilicus is round and convex, and the limbs are firmly connected in a curved shape. It is large and healthy. If the back is yellow, The meat is thinner. In addition, if it is vigorous and crawling around, it is a strong and good crab.
Weigh. For crabs that meet the requirements in appearance, they should be weighed by hand one by one, and the ones with heavy hand feel are fat crabs. This trick is not suitable for river crabs and live sea crabs, as these crabs are often tied up with five flowers.
pull. If you buy a dead sea crab, you should observe the legs of the crab. If the crab legs are intact, and there is a slight elasticity when pulling the crab legs gently, it indicates that it is a fresh sea crab. If the crab is not fresh, gently pull the crab legs. Weak force, and crab legs are easy to break.
smell. If you smell the fishy smell of sea crabs, it means that the sea crabs have been corrupted and can no longer be eaten. Eating spoiled crabs can easily cause food poisoning.