In our daily life, especially in the process of eating, we often see some friends who like to eat shrimp. When eating shrimp, some people like to eat shrimp heads, while others like to eat only shrimp meat after removing the shrimp heads. Then synthesize the questions raised by friends. Why do some people eat shrimp and some people don't go?
The blackening of shrimp head is a practical experience that each of us has experienced in real life. It is the practical experience that each of us has experienced in real life. In fact, the root cause of the blackening of shrimp head is tyrosinase, which is distributed all over animals, and the tyrosinase content in the head is the highest.
Tyrosine will gradually form true melanin, brown melanin and other black substances under the action of tyrosinase. Therefore, the blackening of shrimp heads is due to the action of enzymes, not heavy metals.
In addition, it is not yellow shrimp excrement, but the ovary (testis) of shrimp. Secondly, only the mother shrimp has shrimp yellow, more precisely, the mature mother shrimp, and the mother shrimp with underdeveloped reproductive system has no shrimp yellow. Male testicles, commonly known as shrimp paste, are white. There is also a yellow "shrimp yellow", both sexes, the scientific name is "hepatopancreas".
It is true that shrimp heads precipitate heavy metals more easily than shrimp bodies, but they can only be exposed to them if they live in an environment with heavy metals. Judging from the current situation, most shrimps on the market are farmed artificially. If the water quality and feed are unqualified, it is difficult for shrimp to survive. To say the least, it is hooliganism to talk about toxicity without dose.
The less fresh the shrimp is, the more histamine it contains in its head. Once ingested too much, it will cause physical discomfort, from diarrhea and allergies to food poisoning. Therefore, when choosing, you should buy fresh shrimp, and if you don't buy dead shrimp, you should also pay attention to this. If the head of shrimp falls off easily, or the color of shrimp shell is red, it means that the separation of shell and meat is not fresh.
Shrimp is a very special aquatic animal, and its digestive organs are mainly located in the head. In this world, each of us has different hobbies, whether it is living, working, studying or even eating. In real life, most people eat shrimp to get rid of its head. Probably the biggest reason is that shrimp heads are unsanitary and contain heavy metals and parasites, which is very harmful to our health.
Shrimp is a very special aquatic animal, and its digestive organs are mainly located in the head. Shrimp head is rich in digestible protein, essential amino acids, bioactive peptides and polyunsaturated fatty acids.
In addition, shrimp head also contains a small amount of functional substances such as cephalin, lecithin and astaxanthin. No matter what kind of nutrient it is, it can bring various benefits to our health. From this nutritional point of view, shrimp head is edible and more nutritious than shrimp meat.
Shrimp head is not only edible, but also its nutritional value is not even as good as shrimp meat. As we all know, freshly caught shrimps are very perishable. Even if we are careful in the handling process, shrimps will rot through their own muscle autolysis. I believe everyone has bought frozen shrimp, and we must have seen some stale frozen shrimp, and even the head of the shrimp will turn black, which is the result of polyphenol oxidation. On the other hand, long-term frozen storage will lead to the decline of shrimp quality, and both nutritional value and taste will change greatly.
Shrimp head is not only edible, but also has higher nutritional value than shrimp meat. But sometimes, we choose unsafe shrimp sources, and even improper preservation will lead to subtle deterioration of shrimp.
In this case, not only the shrimp head can't be eaten, but also the shrimp meat can't be eaten. Generally speaking, for fresh and reliable shrimp, we can eat shrimp heads.