Can fish carry formaldehyde and heavy metals? The doctor listed several types, and try to avoid them when buying fish

There are all kinds of meat products on our dining table, but some people have classified them as three, six or nine, saying that "four-legged ones are not as good as two-legged ones, and two-legged ones are not as good as those without long legs." To put it bluntly, it means that fish swim in the water better than poultry and livestock. Whether this claim is true or not is unknown, but when we can be sure, fish is indeed an integral part of our diet.

Generally speaking, the reason why fish has always been popular is because fish itself is a high-protein, low-fat meat. For those who want to eat meat but do not want to consume too much fat, fish is naturally a Preferred. Moreover, fish meat is also rich in unsaturated fatty acids , which are fatty acids that are beneficial to our body and can regulate our body's metabolism. There are also some vitamins in fish, which are not found in other meats, which can help us puzzle and replenish our brains.

Although fish meat is good, some fish may carry formaldehyde and heavy metals. The doctor has listed several types for you here.

red-fleshed fish

In fact, when we buy fish now, in addition to buying freshly killed live fish, some people also choose to buy refrigerated fish, because we may not be able to provide an environment for these fish to survive, and they can only eat refrigerated fish if they want to eat them. For example, hairtail must survive in a high-pressure environment, as are many deep-sea fish, so we can only sell them refrigerated.

However, we should also pay attention when selecting, if the flesh of these fish has begun to turn red, it may mean that the fish has begun to deteriorate . Because the storage time is too long, the bacteria will grow, and the amino acids in the fish will be decomposed into histidine and some other chemical components, and finally the red meat will appear. We better not buy it.

Unexplained dead fish

In some vegetable markets, fishmongers usually clean up a chopping board, put a few dead fish on it, and sell them at a low price. When someone asks, he will also say that it is a fish that has just died and is still fresh. In fact, if we cannot determine the cause of death of this fish, it is not recommended to eat it, because sometimes the dead fish may be used for preservation in order to sell them later , although the amount is not very large, But after all, it is harmful to our human body, so we should not buy it for cheap.

fish on the food chain

Everyone knows the food chain. The so-called "big fish eat small fish, small fish eat shrimp" is the simplest part of the food chain. Another point of knowledge about the food chain is that the higher the level, the more toxins may be contained in the body. As predators at the top of the food chain, our body will also have much more toxins than some low-end creatures. , after all, we ate everything that was not there in the end.

In the water world, fish at the top of the food chain, such as sharks, have higher levels of toxins in their bodies than ordinary fish, such as shark fins, where heavy metals are quite high , and some other large fish The same is true for species, so for the sake of our own bodies, it is safer to eat fish at the bottom of the food chain. To put it aside, even in order to maintain ecological balance, we should not prey on large fish standing at the top of the food chain. Where is it bad to spend money, but it must be spent on destroying the environment?

In general, no matter it is spoiled fish, unexplained dead fish, or large fish, we are not suitable to eat more. We want to supplement nutrition by eating fish meat, and it is enough to buy fresh fish from the supermarket. Now, don't try fish that you don't even know yourself.