With the improvement of living standards, people pay more and more attention to health preservation, especially in diet.

People will eat some meat food, which has high nutritional value, is rich in various nutrients and has health preservation value. However, regular consumption may increase the burden on the body, lead to obesity and increase the risk of cardiovascular and cerebrovascular diseases.

When people realize this, most people will choose to give up meat and eat fish. Fish is fresh and tender, with high nutritional value and low calories. Eating regularly is good for health.

What are the benefits of eating fish?

Fish contains a lot of unsaturated fatty acids, which can reduce fat deposition, prevent heart disease and protect the heart.

Fish contains protein and various trace elements, especially folic acid, which can effectively protect eyesight, prevent retina from being damaged by ultraviolet rays and prevent retinopathy.

Fatty acids and lecithin in fish can enhance the activity of brain cells and improve memory and reaction ability, which is very suitable for developing teenagers.

Fish has high nutritional value, is rich in protein and various trace elements, and has strong antioxidant capacity, which can maintain skin, prevent skin oxidation and delay female aging.

Fatty acids in fish can promote the normal development of children, especially suitable for pregnant women.

Doctor's advice: Try to eat less of this fish, which may induce cancer. Find out the answer.

Smoked fish is a favorite food of southerners. Fish is made by frying, and then added with various condiments to become smoked fish that people like to eat.

Smoked fish tastes good, but there are many harmful ingredients. After fish is fried at high temperature, it will produce harmful components such as benzopyrene and polycyclic aromatic hydrocarbons, plus various seasonings, so smoked fish is not a healthy food.

Because smoked fish takes a long time to make, a certain amount of nitrate may be produced during the production process. Nitrate is harmless to the body, but it will be converted into nitrite under the action of microorganisms. Nitrite can keep the reproduction and growth of Clostridium botulinum in the body, thus prolonging the shelf life of food. However, long-term intake of nitrite can lead to poisoning, nausea, vomiting, abdominal pain, abdominal distension, dyspnea and other symptoms.

Nitrite reacts with protein decomposition products in the stomach to produce carcinogen nitrosamines. Eating a certain amount of nitrite may induce cancer, so it is not recommended to eat smoked fish for a long time from the health point of view.

In addition to smoked fish, these three kinds of fish also suggest keeping your mouth shut.

Although the large deep-sea fish tastes delicious, it is easy to be poisoned after eating because of its large size and excessive accumulation of heavy metals or toxins, which affects personal health. So try not to buy large deep-sea fish when buying fish.

Eat fish and don't buy dead fish. Bacteria may be produced in fish after they die. Regular consumption will do great harm to the body and increase the risk of illness. Don't endanger your health for the sake of being cheap.

Sashimi has not undergone any cooking measures, and its nutritional value is relatively high, but the bacteria in it have also been preserved. In particular, some parasites can damage the liver and induce various diseases. For personal health, try not to eat sashimi.

In spring, these three kinds of "freshwater fish" may be more suitable for us to eat.

Grass carp is a kind of fish with more meat and less thorns. Grass carp is suitable for fish soup, which tastes delicious. It is a good choice to eat grass carp often when spring comes.

Perch is mainly distributed in fresh water bodies in the western Pacific Ocean, China's coastal areas and the sea, with a large number in the East China Sea and Bohai Sea. It is rich in protein, vitamin A, vitamin B, calcium, magnesium, zinc, selenium and other nutrients. Spring is coming, which is the best stage to maintain your health, so perch is also a good choice.

Carp contains protein, fat, unsaturated fatty acids, cholesterol, potassium, phosphorus, sodium, calcium, selenium, iodine, zinc, iron, vitamin A, vitamin B, nicotinic acid, vitamin E and other nutrients. Easy to digest, suitable for children, the elderly and people with weak digestive function of spleen and stomach, which can enhance immunity and make people strong.