Why can t dead crab claws be eaten, why can t dead crabs be eaten?

Crab is a scavenger with strong immunity, eating a lot of bacteria and viruses, but they are all suppressed by the crab's immunity, once the crab is dead, not even dead, just dying, bacteria and viruses will multiply in large numbers and breed some biotoxins. Because crabs like to eat decaying substances such as animal carcasses, their gastrointestinal tracts often carry pathogenic bacteria and toxic substances, and once they die, these germs multiply in large numbers; In addition, the crab body also contains more histidine, histidine is easy to decompose, can produce histamine and histidine-like substances under the action of decarboxylase, especially when the crab dies, histidine decomposition is more rapid, with the longer the crab dies, the more histamine accumulates in the body, and when histamine accumulates to a certain amount, it will cause poisoning. As long as you see that the crab is half dead and has no energy, it is better not to eat it.

If people eat such crabs, it will cause food poisoning, dehydration, electrolyte imbalances, convulsions, and even shock, coma, sepsis, etc., and the common manifestations are nausea, vomiting, abdominal pain, and diarrhea.

The reasons why dead crab claws cannot be eaten are as follows:

When a crab is dying or dead, the hidooxyacids in the crab's body 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. Too high ammonia nitrogen must be excreted from the kidneys, so eating dead hairy crabs is very bad for the kidneys.

Dead crab eaters may experience symptoms such as vomiting, abdominal pain, and diarrhea. Even half-dead "legged crabs" should not be eaten.

Therefore, for the sake of good health, dead crab claws cannot be eaten.

Experts revealed the secret that dead crabs must not be eaten, and what parts of crabs can not be eaten?

Dead crabs cannot be eaten because a large number of bacteria multiply in the body of dead crabs and produce toxic substances; At the same time, bacteria break down proteins, reducing nutritional value.

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.