The main reason for buying frozen shrimp is because of the price difference. Relatively speaking, frozen shrimp is cheaper, and you can freeze it directly after returning home. Let’s take a look at the relevant knowledge.

Choose frozen shrimp

1. Look at the color

There are two types of frozen shrimp, one is red shrimp. Red shrimp is shrimp that has been boiled and then refrigerated. For this type, look at the color of the shrimp brain. If the shrimp brain is very bright and not dark, then it is a good shrimp. And if it turns black, it's not new. Red shrimps are cooked and have grayish-black heads. They are dead and frozen. This type of shrimp is not allowed.

Dead shrimps must not be eaten. Once the crayfish dies, the germs will dissolve immediately. After eating the crayfish, it is very easy for people to be poisoned and suffer from diarrhea. Moreover, crayfish contain a lot of histidine. When the crayfish dies, this histidine will quickly turn into toxic substances, which can easily cause food poisoning after people take it. Only lobsters that have died after drinking ice can be eaten. It is not good to die before drinking ice. Most of the lobsters served with ice are refrigerated while the lobsters are still alive. Although these lobsters are dead, most of them have been frozen due to the low temperature, which will inhibit the growth of edible fungi and reduce the problem of protein spoilage and mildew. After being thawed After that, cook it as soon as possible and it can be eaten.

The second type is green shrimp. For this category. Look at the shrimp head color. It is relatively white, blue-white is the best, and does not need to be reddish. Reddish ones are stale. The black one is not good either.

Tips: The reason why red shrimps in frozen shrimps can be bright red is that they have been cooked beforehand. After the shrimps are boiled, they turn red due to the astaxanthin in their bodies. That kind of shrimp has already been cooked and refrigerated for sale. However, you have to cook it after you buy it home. Even if it is cooked, you cannot eat it immediately

2. Look at the appearance

Whether it is red shrimp or green shrimp, it can be eaten immediately. Use this method to quickly identify, that is, see if the brains of the shrimp have fallen off. If the whole shrimp is more detailed and the head and tail are closely connected to the human body, it means the shrimp is relatively fresh. If the head of the shrimp has fallen off, the head and body, the shell and the meat are loosely connected, and the head and tail are easy to fall off or separate, it is not fresh.