In fact, the sea crab is dead depends on how long it died to decide, if you buy back only after the death of the refrigerator placed in a day or two can continue to eat; after the death of a day, frozen no more than half a month, can eat. But buy back before the dead, dead sea crab to smell there is no smell, but also weigh the weight, too light means that the dead time is long, do not eat, because the dead sea crab parasites will occur some parasitic bacteria, people eat easy to get sick; and histamine for a toxic substance, with the prolongation of the crab death time, the crab body accumulates more and more histamine, more and more poisonous, even if the crab cooked, this toxin is not easy to be destroyed. Even if the crab is cooked, the toxin is not easy to be destroyed. Therefore, dead crabs should not be eaten.

Sea crabs and river crabs are not the same, river crabs can not be eaten once dead, sea crabs will have to see how long dead to determine. It is best to keep the crabs in their own pots with clean fresh water for a few days after they are caught alive, as a way to clean their digestive organs.

Nutritional value

1. Crabs are rich in protein, less fat and carbohydrates.

2. Crab yolk is high in cholesterol.

3. Crab is rich in calcium, phosphorus, potassium, sodium, magnesium, selenium and other trace elements.

4. Crab is rich in vitamin D.

Eating efficacy

1, anti-tuberculosis: crab also has anti-tuberculosis effect, eating crab on the recovery of tuberculosis is very beneficial.

2, nourishing and detoxification: crabs have clear heat and detoxification, tonic bone marrow, nourish tendons and blood, through the meridian, limbs and joints, continue to be injured, nourish the liver yin, the effect of stomach fluid. For bruises, injuries, jaundice, back and leg pain and rheumatoid arthritis and other diseases have a certain therapeutic effect.