Can green shrimp be eaten when it turns black? Why do shrimps turn black?

Many people have asked me before if I can eat shrimp when it turns black. Actually, it depends on the situation, and we can't draw a unified conclusion. So, can the green shrimp be eaten when it turns black? Why do shrimps turn black?

Why do green shrimps turn black?

If the shell is black, it may be that the quality of the shrimp itself has been polluted, or the sediment inside has not been cleaned up.

Generally speaking, there are many reasons for the discoloration of ingredients. You can judge whether there is something wrong with the food by smelling and tasting it. If you smell something strange, try it and stop eating.

Can green shrimp be eaten when it turns black?

Not suitable for eating. When the shrimp turns black, it contains toxins or heavy metals and can't be eaten any more.

Nutritional value of freshwater shrimp;

1, shrimp is nutritious, soft and easy to digest, which is an excellent food for people who are weak and need to be nursed back to health after illness;

2. Shrimp is rich in magnesium, which plays an important role in regulating heart activity and protecting cardiovascular system. It can reduce the cholesterol content in blood, prevent arteriosclerosis, dilate coronary artery, and help prevent hypertension and myocardial infarction.

3. Shrimp has a strong breast enhancement effect and is rich in phosphorus and calcium, especially suitable for children and pregnant women;

4. Scientists at Osaka University in Japan found that astaxanthin in shrimp helps to eliminate the "jet lag" caused by jet lag.

When buying shrimps, you should choose shrimps with complete body, dense carapace, clear shell, tight muscles, elastic body and dry and clean body surface. As for the shrimp with loose meat, reddish color and fishy smell, it is not fresh enough to eat. Generally speaking, if the head is closely connected with the body, it will be fresher.

How to clean shrimps?

Method 1: cut the shrimp head and cut it down from the shrimp brain. But be careful not to cut too much and wash the shrimp yellow off your head. Then use scissors to pick out the shrimp brain and gently pull out the shrimp brain, and some shrimp intestines will be pulled out. Then cut the shrimp tail. If you don't want to look good, cut off a little tail meat from the shrimp tail. Finally, squeeze the shrimp sausage, hold the shrimp back with your index finger and thumb, and exert force on the tail, and the shrimp sausage will come out. Just wash it.

Method 2: Pick out the rectum between the dorsal internodes of shrimp with toothpick or big needle; You can also cut the shrimp back directly with scissors and take out the dirty things, which is simple and easy to make and delicious.

Method 3: Cook the shrimp until it is half cooked, and peel off the shell. At this time, the back muscles of shrimp are easy to turn up, and the rectum can be removed and processed into various dishes.