Eating fish has many benefits, but eating less of these three kinds of fish is very harmful to human health, you know?

Fish is a kind of food with high nutritional value. The content of protein in fish is twice that of pork, and it is high-quality protein, which is easily absorbed by human body. However, the same amount of fish has much lower fat content than pork. For dieters, fish is also an excellent choice to supplement protein. Fish is also rich in vitamin D, calcium, phosphorus and other substances, which can effectively prevent osteoporosis. Fatty acids also have the functions of lowering blood sugar, protecting the heart and preventing cancer. Unsaturated fatty acids have the functions of anti-atherosclerosis, preventing and treating cardiovascular and cerebrovascular diseases, enhancing memory and protecting eyesight. However, although eating fish has many benefits, not all fish are suitable for eating more. People who love to eat fish should pay attention to the fact that these three kinds of fish should be eaten less, and no matter how greedy they are, they are harmful to human health. Do you know which ones?

1. pickled fish

Making fresh fish into salted fish is actually a way for people to preserve fish for a long time at first. It needs a lot of salt to pickle fish and then dry it, so salted fish has high salt content, and eating it often will bring great burden to the kidneys. People with hypertension and urinary system diseases should be forbidden to eat. According to research, salted fish contains a lot of dimethyl nitrite, which will be transformed into dimethyl nitrosamine with strong carcinogenicity after entering human body. So eating salted fish often may increase the possibility of cancer, so try to eat less.

2.puffer fish

The meat of puffer fish is very delicious, and it is known as the "Three Freshness of the Yangtze River", which is why many people are willing to take risks for it. Tetrodotoxin is a strong neurotoxin, which can sting fingers, lips and tongue, and cause vomiting, nausea, limb weakness and other symptoms. If it is not treated in time, it is likely to cause serious consequences. Although puffer fish can be eaten in the market, even after treatment, it is still toxic, because the tetrodotoxin is very stable and can't be destroyed by pickling, sun exposure and general cooking, but because the main part containing toxin has been removed, it can only be eaten without causing much impact, but it is still possible to be poisoned if eaten in large quantities, so puffer fish should be eaten less.

3. preserved fish

Preserved fish is also obtained by salting and drying in the sun, but different from salted fish, many other seasonings are added in the salting process. Eating preserved fish often is very harmful to health. After dried and concentrated, the fat content of preserved fish is much higher than that of fresh fish, which easily leads to diseases with high sugar and fat, and the salt content is also high. The vitamins and trace elements originally contained in fish are almost consumed in the pickling process, so eating preserved fish can not only supplement.

Eat more fresh and non-toxic fish in life, and avoid picking fish that have been dead for a long time or have scars when buying fish. In addition, avoid eating fish on an empty stomach and eat less sashimi. Although sashimi is fresh, it may contain some bacteria that have not been killed, thus causing diarrhea symptoms. We should eat as much processed cooked food as possible.