Can you eat a crab with a dead leg, can you eat a crab when it dies

Quite a few people like to eat crabs. Crabs are not only highly nutritious, but also very tender. But in order to ensure your health, there are many precautions when eating crabs, such as dead crabs cannot be eaten, even if they are just dead.

This is because after the crab dies, it not only tastes bad, but also breeds certain bacteria and even produces certain toxins!

1. Can you eat crabs when they die?

1. According to the living habits of crabs, dead crabs are not recommended to eat. Crabs love to eat rotten food, and pathogenic bacteria and toxic substances accumulate in their bodies. Dead crabs can quickly grow a large number of bacteria in their bodies, so they should not be eaten, especially in hot weather.

2. In terms of taste, the crab loses its original umami after it dies. There is also a type of histidine in the crab's body.

Histidine is easily decomposed and histamine can be produced under the action of decarboxylase.

and histamine-like substances, after the crab dies, the midgut gland will quickly fall apart, and the histidine and digestive enzymes in it.

Scattering out will break down the crab meat. Therefore, the taste of dead crabs is strange and the taste is greatly reduced.

3. The crab itself is non-toxic, but after the crab dies and the crab's shell is damaged, the protein in the crab's body will breed bacteria, and the infected bacteria in its body will multiply in large numbers, and the bacteria may produce toxins. Dead crabs are likely to be poisonous.

4. The body of the crab is easy to carry heavy metals, after the crab dies, the midgut gland will soon fall apart, and the digestive enzymes in it will decompose the crab meat, and the intestinal gland is relatively easy to enrich heavy metals, and the heavy metals will also come out to produce pollution after it rots.

5. If the crab has not been dead for a long time, it can still be eaten if it is refrigerated, remember, it is refrigerated and not frozen, and then it is a sea crab.

2. How to distinguish between dead and alive crabs.

1. First of all, look at the eyes of the crab, touch it with your hand to see if there is any reaction, the one that will move is the live crab, and the one that will not move will change to another method.

2. Crabs can be put into the water, and those that will spit bubbles are live crabs.

3. Untie the rope and wash it with water, and touch it with your hands after a minute or two, if there is a reaction, it will be a live crab.

4. Or lift the crab up, grab the back to see if the crab claws hang down, and if it does not hang down, it is a live crab. Or break the crab legs, and the reactive (rapid natural bending) is a live crab.

3. How to clean crabs.

After the crab is bought home, rinse the dirt on the surface of the body first, and then put it in light salt water.

Soak for a period of time, and the concentration of the salt water should taste slightly salty. Soak the crabs in lightly salted water.

This mainly depends on whether the crab dies for too long, if it is only for a short few hours, it is completely usable.

Dead crabs should not be eaten, and they may be poisoned if eaten.

Crab is delicious and nutritious, rich in protein, fat, carbohydrates, vitamins, amino acids, calcium, magnesium, iron and other nutrients, and is a delicacy on the table. But crabs cannot be eaten after death. Because crabs like to eat animal carcasses and rotting food, their digestive tract contains a large number of pathogenic bacteria and other harmful substances that are harmful to the human body.

In addition, crab is a protein-rich food, and when the crab dies, the amino acids contained in its body will spoil and turn into harmful substances such as putrescine and indole. These harmful substances cannot be completely destroyed even after high temperature cooking, and the longer the crab dies, the more putrescine and indole substances contain. So eating dead crabs can be poisoned.

In particular, the longer the dead crab dies, the greater the damage to the human body, and the more likely it is to have enteritis or even poisoning.

Although the crab is small, it has all kinds of organs. When the hard shell of the crab is removed, we can find that the crab's body parts are protected by a layer of shells, these shield-like shells, which biologists call dorsal carapaces. Appendages on the head, called antennae, have the sense of touch and smell, and some appendages have the function of mouths, which are used to tear food and put it in the mouth.

Autumn is the best time to eat crabs, which are rich in protein and trace elements, and have a good nourishing effect on the body. Crab contains more vitamin A, which is helpful for keratinization. Crabs also have anti-tuberculosis effects, and eating crabs is very beneficial to tuberculosis.

Crabs also contain a large amount of selenium, which can improve the body's immunity.

When the crab is dying or dead, the hidoxylic acid in the crab's body will break down to produce histamine. Histamine is a toxic substance, with the prolongation of death time, the crab body accumulates more and more histamine, and the poisonous gas is getting bigger and bigger, even if the crab is cooked, this toxin is not easy to destroy.

If the crab has just died, it can be eaten; But if the crab dies for more than 5 hours, he advises not to eat it.

Because of the high nutrient content of crabs, the loosening of the connection between collagen fibers and their growth environment, it provides a rich environment for microbial growth, resulting in a high total number of colonies in live crabs, and the content will begin to increase rapidly after death, the longer the death time, the higher the total number of colonies, and the high total number of colonies will cause nausea and vomiting, abdominal pain and diarrhea in the eater.

In addition, relevant studies have found that sulfur-containing compounds can begin to be detected 5 hours after the crab dies, and the crab will emit a fishy odor, and if you eat this odorous food, it is easy to cause nausea and vomiting in the eater.

All in all, if you want to eat crabs, try to eat crabs alive; If you want to eat dead crabs, you must choose crabs that have just been dead for no more than 5 hours, and when cooking, the crabs must be cooked to prevent gastrointestinal reactions and diarrhea.