If the human body wants to carry out complete life activities, it must replenish energy through food and obtain some essential nutrients that cannot be self-made, such as selenium.
selenium is one of the essential nutrients for animal bodies in nature. It is also a common photosensitive material in the industry and a catalyst for the electrolytic manganese industry. Its uses are extremely widespread, such as dry printing, paint, enamel, optical instruments, photocells, metallurgy, alloys, etc. However, the views of selenium vary greatly.
Some people think that enough selenium must be supplemented, some people think that selenium supplementation is an IQ tax, and some people say that selenium may cause cancer. Which statement is correct? What exactly does selenium have on the human body? Let’s take a look at the medical introduction.
1. Is selenium causing cancer or anti-cancer?
The nutritional value of selenium to the human body is undoubtedly, but for those who want to supplement selenium, the risk of cancer is indeed worrying. In fact, many medical studies have discussed the impact of selenium on cancer.
As early as the late 1960s, humans began to study the anti-cancer properties of selenium. A large number of models inside and outside animals have found a phenomenon: When the selenium content in animals exceeds the requirements for protein expression (more than the nutritional dose), selenium will show an anti-cancer effect.
Related domestic and foreign research:
·Yu Shuyu won the 1996 Schwarz Award for its results of "Serial Preclinical and Population Series Intervention Research on Liver Cancer in Low Selenium Population Helocancer ".
·In 2007, researcher Clark conducted a secondary in-depth analysis of the results of an NPC trial that he supplemented selenium to the population to test the effect of cancer prevention by performing selenium supplementation to the population in 1996, and found that the
low baseline selenium level group consumed 200 micrograms of selenium per day, which can reduce the risk of prostate cancer , but has little impact on the risk of lung cancer and colorectal cancer and the total cancer mortality rate.
·009, in a large-scale SELECT experiment, researchers found that selenium supplementation has a certain prostate cancer prevention effect in the low baseline selenium level population, but it is ineffective in healthy people, and even increases the risk of diabetes type 2 in people with high baseline selenium levels.
Explained from existing medical knowledge, the anti-cancer mechanism of selenium is to activate the "gene guardian angel" - P53 gene . This gene will pause the cell cycle after the human gene is damaged and promote the repair of DNA.
More importantly, once the gene is severely damaged, the P53 gene will become the "key" to enable cell apoptosis, inhibiting the development of wrong DNA, thereby achieving the effect of inhibiting cancer.
The impact of selenium on cancer is closely related to gender, race, selenium type, selenium quantity, cancer type, baseline selenium level, etc. A large number of domestic and foreign research results have confirmed that
selenium is only at a low baseline level and has a certain preventive effect on some cancers. Once it exceeds the level, it may induce cancer and diabetes . Therefore, you must pay attention to your own needs and dose for selenium supplementation and do not blindly.
2. Is selenium supplementation an IQ tax?
Many people can’t wait to replenish some trace elements or nutrients after realizing the importance of certain trace elements or nutrients to the human body. Many people also sneer at it and think it is an IQ tax. In fact, selenium supplementation may not be an IQ tax, and sometimes it is really important!
The content of selenium in the human body is less than one-tenth of a million, but it is an essential nutrient that the human body cannot produce itself and has no organs to maintain.
In other words, the human body can only supplement enough selenium from the outside world, but relevant surveys show that selenium-deficient areas in China account for 72% of . In this case, it is not easy to replenish selenium through daily diet.
For this reason, on January 18, 2005, Chinese Academy of Agricultural Sciences took the lead, and jointly with National Torch Plan and the China High-tech Industrialization Committee released and launched the National Selenium Supplement Project in Great Hall of the People .
Selenium supplementation is by no means an IQ tax, but as mentioned above, excessive selenium has limited benefits to healthy people and also has certain health risks to the body. Therefore, normal people with good health only need to ensure that their daily selenium intake is sufficient, and there is no need to supplement it.
Selenium is a life and health element. If selenium deficiency may cause immune loss, skin symptoms, premature birth, fetal nerve and immune damage, adverse pregnancy, miscarriage, hair nail loss, tooth damage, neurological symptoms, and may also cause fertility problems, hemolytic anemia , diabetes, hypertension , cancer risk, liver disease , etc.
Long-term In addition to poisoning, excessive selenium may also cause nausea and vomiting, Hair loss, irritability, fatigue, liver damage, limb numbness and convulsions. In severe cases, there may be a risk of death .
Since the selenium supplementation content is very close to the poisoning dose, many people are also poisoned. Therefore, when supplementing selenium, you must check whether you are selenium deficiency in a regular hospital. Strictly follow the doctor's instructions and do not blindly supplement selenium without authorization.
3. What roles does selenium play in the human body?
Selenium will participate in life activities in various forms, and it will play multiple roles in the human body. Although not all roles are irreplaceable, you will know the importance after reading it.
. Enhance immunity
Selenium element can enhance the immune system's recognition function of pathogens invading the body, and also have a positive effect on antibody synthesis and blood antibody levels, which can comprehensively increase human resistance.
, beneficial to the brain
, the authoritative medical journal "Cell Metabolism" published a study jointly completed by Professor Gerd Kempermann of of Dresden University of Technology, Professor Hou Shengtao of of , and Professor Tara L. Walker of , the study confirmed that
, and the neuronal gyrus of of of of q.m. The study confirmed that
selenium plays a key role in the process of exercise in optimizing the cognitive level of the hippocampus dentate gyrus. Selenium supplementation and exercise have similar beneficial effects on neuronal regeneration, and both have the effect of improving hippocampal lesions.
. Prevent and control certain diseases
Eye disease: Research has found that selenium can not only improve vision, but can also be used to treat eye diseases such as retina and cataract . Its mechanism of action may be that selenium eliminates the free radical substances that damage the eyes and acts on vitamin A to protect the eyes.
liver disease: The liver is the tissue with the highest content of selenium in the human body. Selenium can strengthen the activity of an enzyme in the liver (glutathione peroxide enzyme), enhance its detoxification and detoxification ability, and achieve the purpose of repairing damaged liver cells and protecting the liver. Clinically, selenium supplementation can also assist in the treatment of liver diseases such as liver necrosis , hepatitis, cirrhosis , and even liver cancer.
Diabetes: Selenium can act on pancreatic islets, which can have a certain repair and functional maintenance effect on it, and has a certain effect of controlling blood sugar.
Heart disease: Selenium can protect the blood vessel walls, reduce the harm of cholesterol and triglyceride , thereby reducing the risk of cardiovascular disease.
Selenium can stimulate the activity of antioxidant systems and related substances in the human body. Antioxidant substances can remove free radicals, which can repair damage and delay aging. Some studies have also found that the selenium content in the body of long-lived elderly people is much higher than that of ordinary people, which shows that selenium does have a certain possibility of long-lived life.
. Natural antidote
Selenium contacts heavy metals and will react to produce metal selenium protein. This substance is non-toxic, so the selenium element in the human body can be said to be the "antigen" of heavy metals.
. In terms of reproduction,
The selenium content of the male reproductive system accounts for 25-40% of the total selenium content of the whole body. Its main function is to strengthen sperm function and sexual ability. Selenium can also play a certain protective role in the female reproductive system.
4. How to supplement selenium?
Although selenium is important, the more it is supplemented, the better. How much should it be supplemented to maximize the benefits of selenium to the human body?
Chinese Nutrition Society One of the 15 daily dietary nutrients announced in the 1980s is selenium, and it is recommended that Adults consume 50-250 micrograms per day, and the recommended intake of women during pregnancy is 65 micrograms.
also pointed out that the maximum tolerant intake of selenium by of the human body is 400 micrograms, and exceeds 400 micrograms, which may be excessive and pose a risk of poisoning. Be careful, especially when living in areas where food is rich in selenium.
(Photo source network)
Food selenium content from high to low:
Brazil nut (1900 μg per 100g); Bumblebee fillet (320 μg per 100g); animal liver and kidney (100g pig kidney contains 240 micrograms, pig liver 67 micrograms, bovine kidney 210 micrograms).
In addition, Marine animals , meat, eggs and other foods also contain a certain amount of selenium. In addition to supplementing selenium through foods rich in selenium, you can also take some supplements as recommended by the doctor.
Selenium supplementation is originally a good thing for ordinary people to prevent disease risks, but wrong selenium supplementation operations can also bring health risks. Therefore, it is recommended that everyone should replenish selenium rationally and safely under the advice of professional doctors. At the same time, we also hope that the public can face up to the importance of nutrients. #组合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合合� Experts will teach you how to replenish selenium scientifically. People's Daily .2022-09-16
[2] Yi Chu, "Selectine--It turns out that it really fights cancer". Zhihu-Cancer Topic.2016-12-12
[3] Wire-Substitute Rain, "Selenium can "replenish the brain"! Chinese scientists have discovered that the key to promoting neuronal generation is selenium, and supplementation of selenium may help treat cognitive impairment 丨Scientific Discovery》. Singularity Network. 2022-03-05
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