Is a layer of black in the belly of a fish a sin of heavy metals?

Let's first understand what this black film is.

After checking on the Internet, it was learned that the scientific name of this black membrane is "peritoneal visceral layer", also known as the endometrial visceral layer, which exists between the abdominal wall and internal organs of the fish. So what exactly does it do?

Some people think that this membrane has the effect of filtering pollutants and is "very toxic". In fact, "filtering poisons" is not the main function of this membrane, but it is also its secondary function.

Actually, it is very useful. Its main functions are: the peritoneum can cover most of the organs in the abdominal cavity, and has the effect of absorbing impact and protecting internal organs; It also secretes mucus to moisten the surface of organs and reduce friction between organs.

Therefore, this film actually plays a role in lubricating and protecting internal organs.

Moreover, not only fish, but also many higher vertebrates have such a layer of mucosa in the abdominal cavity, and even in our human stomach, there is such a membrane, the main role is to protect the internal organs and lubricate.

Although the color is black, it does not mean that the pollution is serious.

Since this layer of black clothing has nothing to do with pollution, can this black film coat still be eaten?

First of all, since it is just pigment cell deposition and not a contaminant, it is edible and does not have major safety concerns. However, this membrane is mainly composed of olein fat cells, which is high in fat, and it is not a healthy choice from a nutritional point of view. From a safety point of view, when pollutants such as heavy metals, dioxins, pesticides, etc. enter the fish, many pollutants, especially some fat-soluble pollutants, are more likely to be enriched in these adipose tissues.

Therefore, it is not recommended to eat it either.

In general, the black membrane in the belly of the fish is not necessarily a sign of serious pollution, but the membrane itself is high in fat, the nutritional value is not high, and it is easier to enrich some fat-soluble pollutants, so it is not recommended to eat too much.

In fact, the scientific name of this black membrane is "peritoneal visceral layer", also known as the endometrial visceral layer, which exists between the abdominal wall and internal organs of the fish. Many people will wonder, what is the use of it growing so ugly?

Some people think that this membrane has the effect of filtering pollutants and is "very toxic". In fact, "filtering poisons" is not the main function of this membrane. If you really think so, then you are too much to judge the "fish" by appearance.

Actually, it is very useful. The peritoneum can cover most of the organs in the abdominal cavity, and has the effect of absorbing and impacting to protect internal organs; It also secretes mucus to moisten the surface of organs and reduce friction between organs. Therefore, this film actually plays a role in lubricating and protecting internal organs.

Although the color is black, it does not mean that the pollution is serious.

Chinese like white and think that one white covers a hundred ugliness. Therefore, when you see black, your first reaction will be that it is dirty and polluted.

In fact, it is a mistake to judge the degree of contamination of a fish based solely on the color of the inner membrane. In fact, the color of the inner membrane of the fish belly is determined by the melanin content of the fish, and there is no scientific basis for considering it a toxic pollutant based on the color of the black membrane alone.

There are basically four types of pigment cells in fish, namely melanin, yellow pigment, red pigment and struvite cells. There are melanocyte deposits on the surface of the peritoneal visceral layer and struferin deposition in the peritoneal parietal layer. Different fish species have different distribution of pigment cells in the visceral and peritoneal wall layers, so different colors will appear.

With the same species of fish, why don't wild fish with good water quality have this layer of black film?

But compared to other meats, fish is also very risky meat, because other meats can only be sold after quarantine, and it can be obtained in small lakes, and there are many people who like to eat wild fish.

When choosing fish, I often like to pick some larger fish, which are relatively transparent and cheaper in the usual market. I feel that the larger the fish, the more nutrients in it, but on the contrary, the doctor's suggestion is that it is best not to buy this kind of larger fish. According to the analysis, this kind of large fish may have been raised with ripening agents, and then grow to such a large size, if the body often takes a lot of ripening agents, it will not only harm their health, but also endanger the normal operation of each organ of the body.

Some people especially like to eat fish heads, and even think that eating fish heads is getting smarter and smarter, but because fish live in water, with the pollution becoming more and more serious in recent years, the fish plug of the fish head will carry a lot of heavy metals such as lead. The older the fish, the higher the heavy metal substances, the more germs stored in the fish head, there are more parasites and their heavy metal intake, and too much heavy metal ingestion in the body will also endanger health. Therefore, people who love to eat fish must pay attention to clean the fish plug, remove the fish head completely, and boil it completely when cooking, which can solve a lot of germs and viruses.

Eating fish itself has many benefits for health, because fish contains more nutrients, such as protein, nutrients and minerals, and is rich in unsaturated fats, eating more in moderation has a maintenance effect on blood vessels, and secondly, other nutrients can help improve the body's immunity, suitable for people who lack nutrients or are relatively weak.

In addition, the taste of fish is more delicious and there are many types, and the taste of each fish will be different, so more people will love to eat it. Eating fish is beneficial and delicious, but when eating fish, when choosing fish, some people will choose the wrong fish, which is easy to bring adverse harm to the body, and it is necessary to remember that some fish will carry heavy metals, and the human body may cause related problems if they take too much.

If the fish is older, it is likely to exceed the standard; This is not necessarily true.

It is necessary to pay attention to the choice of fish species, and be sure to pay attention to the surrounding environment when fishing, so as to better avoid problems.

First of all, it's definitely not to be eaten! Including marine fish and river fish, there is a thin black membrane coating on both sides of the abdominal wall, which is the most fishy, earthy part of the fish body, and contains a large amount of histamine, lipids, lysozyme and other substances. Histamine entering the body can cause nausea, vomiting, abdominal pain, and other symptoms.

Moreover, this black film is also a collection place for various harmful substances, which is formed by long-term pollution of toxic components such as bacteria, pesticides, and dirt in the water quality, and is harmful to the body when eaten. Therefore, after cutting the fish, it is necessary to scrape off the "black clothes".

The so-called carcinogenic statement is not absolute, but too many harmful substances may cause cancer!