1, the live fish killed now can't be eaten.
Fresh live fish will be in a stiff stage just after being slaughtered. At this time, the energy metabolism in the fish is still going on, and a series of biochemical changes will occur. At this stage, fish will produce a small amount of lactic acid and phosphoric acid, which will inhibit the reproduction and growth of corrupt microorganisms. At this time, the fish is still weakly acidic and the meat is hard. Protein in fish tissues is not decomposed to produce amino acids, which are the main components of umami flavor. If you cook at this time, not only the taste is poor, but also the nutrition can not be fully absorbed by the human body, and the acidic meat quality will also affect digestion. In addition, there may be some toxins, parasites or bacteria in fish, and these harmful substances that are not dead may also enter the human body.
2-5 hours after the fish is slaughtered, some enzymes in the fish begin to play a role, decomposing protein into amino acids, making the fish delicious and tender. At the same time, the metabolism of fish has stopped, most toxins have been discharged, and all bacteria have died, so this is the best time for cooking. After more than 6 hours, the fish began to rot and become soft, and microorganisms proliferated in large numbers, making the fish easy to deteriorate. Therefore, if you want to eat delicious and nutritious fresh fish, it is best to slaughter it and put it in the refrigerator for two or three hours before cooking. If placed indoors, the time is shortened to 1 hour when the room temperature is high, and extended to 5 hours when the room temperature is low.
Therefore, killing live fish is not suitable for eating immediately, and you should pay attention to this when buying fish. There are many kinds of fish, not all of which are not suitable for slaughter and eating now. Salmon, for example, is more suitable for slaughter now because of its tender meat. It can be seen that many people pay attention to eating fish. You should learn more about eating fish.
2. Healthy tips for eating fish
1, eating fish on an empty stomach-leading to gout.
In order to lose weight and socialize, many people like to eat only vegetables instead of meals. It is also common to eat fish on an empty stomach, but it is likely to lead to gout attacks. Gout is a disease that causes tissue damage due to the increase of serum uric acid caused by purine metabolism disorder. However, most fish are rich in purine. If you eat a lot of fish containing purine on an empty stomach, but there is not enough carbohydrate to decompose, the acid-base balance of the human body will be unbalanced, which is easy to induce gout or aggravate the condition of gout patients.
2, eat sashimi-get "liver fluke disease"
Many people like the freshness and delicacy of sashimi, but they don't know that eating raw sashimi is bad for the liver, and it is easy to infect liver fluke disease and even induce liver cancer. According to experts in nutrition and health, liver fluke disease is a parasitic disease with hepatobiliary lesions as the main factor. People who eat raw or semi-cooked freshwater fish, shrimp and freshwater snails containing live metacercaria of Clonorchis sinensis are very likely to be infected. At present, there are millions of patients with clonorchiasis in Guangdong Province, many of whom are infected by eating raw fish and shrimp.
3, eat alive-residual toxins harm the body.
Most people think that the fresher the fish, the better, so they like to eat it alive, thinking that only in this way can the fish be delicious and nutritious. But this is actually a misunderstanding. Whether it is artificially raised fish or wild fish, there are certain toxic substances in the body. If you eat it alive, it is often too late to completely remove the toxic substances in the fish, and the parasites and bacteria on the fish have not completely died. These residual toxins are likely to cause harm to the body.
4, eat fish gall-detoxification does not prevent poisoning.
Fish gall is a traditional Chinese medicine, which is commonly used in Chinese medicine to treat red eyes, gall bladder pain, laryngitis and malignant sores. Therefore, according to folklore, eating fish gall can clear away heat and detoxify, improve eyesight and relieve cough, so although fish gall is bitter, there are always people eager to try. Eating fish gall is extremely dangerous, which can easily lead to poisoning and even life-threatening. Experts pointed out that fish bile contains water-soluble toxic toxins such as "sodium carp alcohol sulfate", which is heat-resistant and will not be destroyed by alcohol. Therefore, poisoning may occur whether fish bile is cooked, swallowed raw or taken with wine.