After the patient is ill, the doctor will advise the patient to eat more fish, not only because the fish is rich in nutrition, but also because the fish is very easy to digest, not only suitable for patients but also for the elderly. So how to choose more healthy and clean fish? What are the benefits of fish?
Carassius auratus is rich in DHA. They are mainly in the brain, retina and nerves in humans. DHA can not only maintain the normal function of the human retina, but also benefit the development of the human intelligence system. Therefore, eating more fish can make people smarter.
Catfish meat is rich in protein, and the content of protein in every 500 grams of fish is equivalent to that in 600 grams of eggs or 850 grams of pork. Rich protein is the carrier of human life. It has the functions of balanced nutrition, regulating water balance in the body, and improving immunity. It can effectively help young children, children and adolescents grow and develop. This is one of the reasons why we eat fish when we are sick or have a wound on our body, because fish can also help the wound recover and heal.
Eating fish regularly can lower blood lipids. Medical experiments have proven that under the same blood lipid level, people who eat fish after a period of time can continue to lower blood lipid levels than people who do not eat fish frequently, the difference between the two blood lipid levels is 40%.
Many foods are not easily digestible, and fish is a food that can be easily digested. Fish meat is easily digested and absorbed by the body. The protein structure of fish meat is soft, the muscle fiber structure is short, the water content is high , and the absorption and utilization rate can be as high as 96%.
High cholesterol is a very dangerous situation, but did you know that eating fish can help us lower our cholesterol? Most of the fats contained in fish meat are unsaturated fatty acids, which are easily digested and absorbed by the body. The digested and absorbed fatty acids can be combined with blood cholesterol in the blood, taking cholesterol away from the blood vessels, thereby reducing the cholesterol content in the body. It is good for your health.
Medical research shows that if women eat fish every week during pregnancy, the chance of infants suffering from eczema will decrease by 43% in the future. So pregnant women must eat more fish.
When buying frozen fish, you should first observe its eyes and gills. Fresh fish eyes are full, the cornea is transparent and clear, and the gill filaments are bright red. Secondly, the eyes of fresh fish are not full, the cornea is wrinkled and slightly turbid, and sometimes the blood in the eyes becomes red, and the gills become dark red or gray-purple. Corrupted fish s eyeballs collapsed or dried up, the cornea shrank or ruptured, and the gills were brown or off -white.
The quality of the fish meat after slaughter is not the best, because the fish meat has a process of acid removal and it needs to be left for a while to be more delicious. Small fish such as grass carp and catfish should be refrigerated immediately and cooked after 2 hours; large fish need to be refrigerated for more than 2 hours.
Depending on the species of catfish, red meat fishes such as tuna and white meat fishes such as tuna are distinguished. However, if the color of the fish is too bright red or bright white, it is likely to be the merit of the dye.
The size of the sturgeon determines its taste and safety. Too small, the fish has not yet matured, the meat is not tender enough, and the fishbone will appear extra large. Too big means that the fish is old, the meat is rough, and many harmful substances may accumulate in the body. Therefore, it is more appropriate to buy fish with a size of eight cents. For example, carp and Wuchang fish should be 1 and a half pounds, 0.5 to 1 pounds of catfish, and 4 to 5 pounds of grass carp.
Aquatic products may contain more nitrite. During the drying or curing process, some of the proteins are decomposed to produce amines, which combine with nitrite to form nitrosamines, which has a certain risk of carcinogenesis.
There may be parasites in the sashimi. The parasites have poor resistance to heat and low temperature. They can be killed after freezing for 24 hours at minus 20 ° C, while the ice cubes in the sashimi dinner plate are completely up. No effect of killing parasites. Therefore, you can only eat raw fish if you are assured of the source of the ingredients.