Overnight seafood will produce protein degradation products, which will seriously damage the kidney and liver. If you take it for a long time, it will reduce the function of liver and kidney, so don't eat some shrimps, crabs and shellfish overnight.

If seafood is kept in the refrigerator overnight, it will breed a lot of bacteria if it is kept moist for a long time, and it will not be completely killed when heated the next day. In the long run, it will cause gastrointestinal diseases and even food poisoning. Once the shrimp is cooked, you must finish it on the same day, and you can measure it when cooking.

Extended data:

Distinguish the freshness of shrimp:

1, the fresh shrimp is bent. Fresh shrimp has a complete head and tail and is closely connected with the body. Shrimp body is quite hard, with certain elasticity and curvature. However, the head and body, shell and meat of aged shrimp are loosely connected, and the head and tail are easy to fall off or separate, which can not maintain its original curvature.

2. The surface of fresh shrimp is dry. Fresh shrimp looks clean and feels dry. However, when the shrimp body is about to deteriorate, the granular cells secreting mucus in the lower layer of crustaceans disintegrate, and a large amount of mucus penetrates into the body surface, which feels greasy. If the shrimp shell sticks to your hands, it means that the shrimp has gone bad.

3. Fresh shrimps are brightly colored. Different species of shrimp have slightly different colors. Fresh shrimps, rock shrimps and grass shrimps are blue, shrimps caught in the sea are pink, and bamboo shrimps and new shrimps with knife forehead are black and white with a slight pink color. If the shrimp has black hair, it is stale shrimp, and the whole shrimp is dark and not bright, which means it has gone bad.