The harm of marine fish to health, many friends especially like to eat fish in life. Protein in fish products is twice that of pork, and it is a high-quality protein, and the fat content in fish is low. What are the following hazards of sharing marine fish?

Harm of marine fish to health 1 What harm does eating marine fish do to health?

Some deep-sea fish, because of their extremely high mercury content, even if they are only eaten twice a week, may have too high mercury content in their bodies for a long time, showing signs of nervous system diseases, poor memory and inability to concentrate.

Because more people like to eat fish now than before, they used to eat offshore fish, such as mullet and halibut, and now they often eat big ocean fish, such as tuna, salmon, swordfish, Chilean sea bass and halibut.

Professor Xiao of Ocean University also confirmed that pelagic fish are located at the top of the food chain because of their large size, so if mercury accumulates in lower organisms, of course, the mercury content in big fish is higher, and people who eat big fish are very likely to be poisoned by mercury.

Usually, people with mercury poisoning often have symptoms such as memory loss, unwarranted anxiety, disorientation, irritability, headache, involuntary body trembling, numbness or tingling of hands and feet, sparse hair, easy hair loss, joint pain, slurred speech and so on, and even lead to heart diseases such as arrhythmia.

Harm of marine fish to health 2 What is the harm of eating marine fish every day?

Marine fish are fish that live in the sea. Eating marine fish every day may cause allergies, gout and other hazards.

1, allergic: marine fish belongs to seafood. If you are sensitive, eating marine fish every day may cause seafood allergies. The main symptoms will be papules or erythema on the skin surface, which may also lead to abdominal pain, diarrhea, nausea and vomiting. It is necessary to stop using marine fish in time. At the same time, you can also take loratadine tablets and levocetirizine hydrochloride tablets under the guidance of a doctor.

2. Gout: Gout may be caused by eating too many foods containing purine substances. Marine fish is a food rich in purine. If you eat marine fish every day, it may cause gout, which is characterized by redness and swelling of one or more joints. When the skin temperature rises, the skin on the joint surface is red, purple, tight and shiny. At this time, you can take febuxostat tablets and benbromarone tablets under the guidance of a doctor.

It is recommended not to eat marine fish every day, but to arrange the diet reasonably and maintain a balanced nutrition.

Harm of marine fish to health. Is sea fish better than river fish? The truth may not be what you think.

True identification

From the point of view of nutrition and safety, marine fish are not necessarily better than river fish. Sea fish and river fish are both good fish, and there is not much difference.

Verifier: Ruan Guangfeng, Director of Science Communication Department of Food and Nutrition Information Exchange Center, and Ruan Guangfeng, official account of WeChat.

Fish is a kind of healthy food, which is deeply loved by people because of its delicious taste. Everyone used to eat river fish, but now all kinds of sea fish are on people's tables.

Many people think that marine fish are rich in nutrients, and DHA (a kind of polyunsaturated fatty acid beneficial to human body) is high and healthier, not to mention there is no pollution such as heavy metals. Is that really the case?

Marine fish have more DHA and are healthier?

Marine fish actually belong to saltwater fish, while river fish are freshwater fish. Many people think that deep-sea fish are healthier, one of the reasons is that they have higher DHA content. In fact, the DHA content of freshwater fish is not necessarily lower than that of marine fish.

Four kinds of freshwater fish (snakehead, Baotou fish, crucian carp and mandarin fish) and six kinds of marine fish (giant salamander, saury, rainbow trout, cuttlefish cod and hairtail) were studied and determined. It was found that the content of n-3 polyunsaturated fatty acids in freshwater fish was not lower than that in marine fish.

There are five kinds of marine commercial fish, such as salmon, hairtail, yellow croaker, Spanish mackerel and pomfret, and nine kinds of freshwater fish, such as perch, mandarin fish, Chinese sturgeon, silver carp, bighead carp, tilapia, Wuchang fish, carp and grass carp. The contents of EPA and DHA in fish and visceral fat were analyzed and compared. The results showed that EPA and DHA in freshwater fish

From these results, the DHA content of deep-sea fish is not necessarily higher than that of freshwater fish as everyone thinks.

Marine fish are safer?

Marine fish grow in the ocean, and everyone will think of blue sky and blue sea. When it comes to river fish, everyone will think of sewage. So many people will think that marine fish is safer. Is it true?/You don't say.

In fact, this is just a beautiful imagination of everyone. In today's globalization, even marine fish may still be polluted by the environment, and sometimes the pollution is even more serious.

Parasites, heavy metals (mercury, cadmium and arsenic pollution) and persistent organic pollutants (polychlorinated biphenyls and polybrominated biphenyls) are the most common pollutants in fish. So, what are these substances in marine fish?

Many people think that if the sea water is salty, there will be no parasites. In fact, like other animals, almost every kind of marine fish can be infected by parasites. At present, there are many kinds of parasites in marine fish, and fish diseases caused by these parasites, such as cryptosporidiosis, myxosporosis and tumor disease, are often faced by marine fish.

Take the notorious heterosexuals for example. It is a parasite distributed all over the world, and its "insect trace" can be found in all major sea areas of the world. Salmon, salmon, tuna, sea bass, cod, hairtail, eel, grouper, herring, red snapper and so on may be polluted by it.

As for heavy metals, some studies have detected arsenic and other heavy metals in 10 fish that people often eat in Beijing market. The results show that the content of heavy metals in marine fish is higher than that in freshwater fish. The detection of aquatic products sold in Shanghai shows that the content of cadmium in marine fish is also higher than that in freshwater fish.

Duke University's research also found that methylmercury in the deep sea is more difficult to decompose in the environment, because it combines with salt (sodium chloride) molecules and is more harmful to health. In fact, several kinds of high-mercury fish, including sharks, swordfish, mackerel, square head fish and so on, which are reminded not to eat by health institutions in various countries are all marine fish.

As for persistent organic pollutants, some studies have evaluated the pollution level of PBDEs in fish sold in Shenzhen.

The results showed that the median contents of PBDEs in freshwater fish and marine fish were 328.2, 1 108.8 pg/g wet weight, respectively, and marine fish was higher than freshwater fish. The concentration and bioavailability of polychlorinated biphenyls in animal food sold in Shanghai were evaluated. The results showed that the concentration level of PCBs in marine fish was higher than that in freshwater fish.

It should be reminded that although pollutants are detected in fish found in the market, they usually do not exceed the standard. Considering the daily consumption, it will generally not cause harm to people's health, so you don't have to worry too much.

Sea fish and river fish are both good fish.

In fact, there is not much difference in nutrients between freshwater fish and marine fish.

Marine fish and river fish are high-quality foods with more fat and less fat in protein. They also contain unsaturated fatty acids, vitamin D, selenium and other nutrients. In terms of safety, parasites, heavy metals and other issues are the enemies of marine fish and river fish. Why do humans divide them into high and low levels? Fish just want to say: a good fish doesn't ask about its origin!