It is best to eat after removing the internal organs, because loach is more tolerant of mercury ions and chromium ions, so these two heavy metals may remain in the internal organs, and loach is also a fish, and the bitter gall in it may cause food poisoning.
Loach meat is of high nutritional value, and the introduction to loach meat can refer to my recent Q&A. Loach meat is thick and delicious, and studies [3] have shown that loach also contains a variety of functional active substances, including lectins, antimicrobial peptides, superoxide dismutase, taurine, loach polysaccharides, etc., which is also the reason why loach has medicinal value.
But we should also be clear, loach also belongs to fish, in recent years, because there are not many cases of fish bitter bile poisoning, mainly for the case of acute kidney failure [1], in fact, the bile toxin in the bitter bile, will cause damage to multiple organs throughout the body, but the kidney damage is the mainstay, the damage to the coagulation function is relatively light, so for safety, it is best to remove the internal organs, including the bitter bile together.
The study [2] found that compared with other fish, loach is more tolerant of mercury ions and chromium ions, but extremely sensitive to copper ions, which shows that if the water quality of loach contains heavy metal mercury ions and chromium ions, then the loach's internal organs are bound to remain heavy metal mercury and chromium, and the intake of excessive heavy metals must be harmful to the human body, if you want to be safe, it is best to remove the loach's internal organs and eat it.
The method of removing internal organs is not troublesome, directly chop off the head, the internal organs will naturally leak out, or cut a hole in the stomach, and then scrape it with a knife, but it is more troublesome. You can also buy the loach back with clean water, and then drop a few drops of oil in the water, loach has a special intestinal breathing function, if the water is deficient in oxygen, it will start, which can help the loach to quickly excrete the dirty things in the stomach and intestines, reducing the impact of heavy metals or other dust bacteria on our body.
In general, eat loach is best to remove the internal organs and eat, if you will not deal with it, you can let the market master help to scrape clean, and although the nutritional value of loach is very high, but you can not eat too much at a time, it is best to eat with other foods, so that the diet is balanced, so that the way of eating is healthy.
This issue is written by Liao Yuying and Zhao Lichao
Editor: Peng Mingqian
bibliography:
Peng Wenping,Lin Bo. Blood purification and nursing in 65 cases of fish bitter bile poisoning[J].Chinese Journal of Misdiagnosis,2009,9(2):381-382.
[GAO Xiao-li, QI Feng-sheng, LUO Hu-ying, et al.Acute toxicity and combined toxicity of copper, mercury and chromium on loach[J].Journal of Water Ecology,2003,23(2):63-64.
Qin Chuanguang,Huang Kaixun,Xu Huibi. Bioactive Molecules in Loach and Their Pharmacological Effects[J].Chinese Journal of Biochemical Medicine,2002,23(1):47-48.
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