Because both marine fish and freshwater fish belong to fish, the nutritional components of marine fish and freshwater fish are generally the same and have high nutritional value. First, because fish are rich in protein, the proportion and content of essential amino acids in protein meet the nutritional needs of human beings. Therefore, the use of fish is one of the main ways for human beings to ingest protein. Secondly, because fish contains less fat, which is mainly composed of unsaturated fatty acids, the absorption rate of human body is very high, generally up to 95%. Unsaturated fatty acids can prevent cardiovascular and cerebrovascular diseases and lower cholesterol. First, because the nutritional value of fish is extremely high, mainly including minerals such as calcium, phosphorus and iron, and the liver of fish also contains a lot of vitamin D. Fourth, because the water content in fish is relatively high and the muscle fiber is relatively short, its meat quality is tender and it is more easily absorbed by the human body than many livestock and poultry. So eating more fish is helpful to human health.
First, the nutrition and taste of marine fish.
Although marine fish and freshwater fish have many similarities, their taste and nutrition are slightly better than freshwater fish. Specifically, it is mainly because seawater is rich in nutrients, and the main difference between seawater and fresh water is the salt content. Seawater contains a lot of nutrients, and marine fish live in nutrients, which contain high vitamins and minerals. In addition, the body oil and liver oil of marine fish contain a highly unsaturated fatty acid, which is not available to animals and plants on land. This unsaturated fatty acid contains "brain gold" component, also known as DHA. DHA is an essential nutrient in human brain, which is of great significance for improving people's thinking ability and memory. At the same time, marine fish also contains taurine and omega fatty acids, which are much higher than freshwater fish. These components have great protective effects on the brain and heart. Japanese catfish is also a kind of marine fish. Its shape is round and long. This kind of fish is rich in nutrition and high in calcium, which is good for people who have not recovered from a long illness. In addition, this trace element belongs to a kind of marine fish, and its nutritional value is very high.
In terms of taste, sea fish tastes fresher than river fish. This is because the swimming range and swimming strength of marine fish are larger than those of river fish, which makes their muscles more elastic and delicious. The main cooking methods of Renhai fish are steaming, stewing, boiling, frying and stewing. When eating, cooking and roasting can better retain the nutritional value of fish and make the meat more tender. However, marine fish should not be eaten raw. This is because marine fish are easily infected with Isospora when eaten raw, which is very
May cause human allergies and abdominal pain.
Second, the nutrition and taste of freshwater fish
Silver carp and bighead carp are the main species of freshwater fish, and fish meat contains a lot of n-3 series fatty acids and n-6 essential fatty acids. Therefore, eating silver carp and bighead carp regularly will be beneficial to human health to a great extent, and can also effectively prevent arteriosclerosis and fully alleviate cardiovascular diseases. Grass carp is also rich in nutritional value, which mainly has the effects of expelling wind, calming the liver and warming the stomach. It is a kind of fish food that can be used to preserve health and tonify deficiency. Shad is also a kind of freshwater fish.
It has the effects of promoting diuresis, eliminating dampness, promoting blood circulation, dredging collaterals, invigorating middle warmer, invigorating qi, stimulating appetite and strengthening bones and muscles, and is beneficial to human body after eating. Silver carp also has mild effects of moistening skin, warming stomach and benefiting air temperature, and is also one of the foods for health preservation and invigorating qi. Bighead carp is a kind of freshwater fish that is cultured in large quantities. It has the effects of nourishing brain marrow, dispelling wind in the head, nourishing blood and warming stomach, and can also be used to treat headache, dizziness and dizziness caused by wind evil or irregular menstruation and dysmenorrhea. At the same time, freshwater fish heads are rich in nutrition, especially bighead. It contains a lot of unsaturated fatty acids, which has a very good effect on people's mental development. Compared with marine fish, freshwater fish also have certain differences in taste. Generally, freshwater fish will have a "earthy smell" when eating, because the place where freshwater fish grow is mainly in the water environment with more humus. Long-term growth in such an environment will easily lead to the continuous reproduction and growth of actinomycetes, and bacteria will constantly invade the blood of freshwater fish through gills, and at the same time secrete a brown substance with "earthy smell", which is harmful to people's health.
This shows that marine fish and freshwater fish have their own advantages in nutrition, so they should be purchased according to their actual needs and their cooking methods should be appropriate.
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