1. Quick-frozen crabs do not touch water or other substances, and their nutrients will not deteriorate. Crabs are rich in protein, and only when exposed to other substances will they deteriorate, while quick-frozen crabs will not.

2. When the crab is dying or dying, the oxyacid in the crab will decompose to produce histamine, which is a toxic substance. With the extension of death time, the histamine in crabs will accumulate more and more, and the toxic gas will become bigger and bigger. Even if the crab is cooked, this toxin is not easy to be destroyed, so you must not eat it if you die slowly.

There are many ways to eat crabs, but not all of them are suitable for you, and you will get sick if you eat them indiscriminately, as follows:

1, eating pickled crabs and drunken crabs, the infection rate of paragonimiasis is as high as 55%.

2. Eating crabs raw, the infection rate of paragonimiasis is as high as 765,438 0%, which may also cause intestinal inflammation, edema, congestion and other symptoms.

3, eating steamed crabs is the most hygienic and safe. When eating, you must remove four substances: crab gills, crab hearts, crab stomachs and crab intestines, because they contain bacteria, viruses and sludge.