"I heard that selenium can fight cancer. Is it true? Now my mother bought a bunch of selenium-rich rice and put it at home. It cost a lot of money."
received a private message from a fan in the backend, saying that things are good for everything. Selenium is expensive. There are many foods on the market that are labeled with selenium, and the price will increase several times. Even the country calls on to supplement with selenium . Can selenium supplementation really fight cancer?
1. Selenium is an essential element for the human body.
There are currently more than 90 elements known in nature, and the human body has more than 60 of them. Among them, there are 23 kinds of chemical elements that are necessary for the human body, including Selenium is an element that cannot be synthesized by the human body itself.
What exactly does selenium do?
. Antioxidant
Selenium has a strong antioxidant effect, which can help remove excess free radicals in the body and protect the membrane structure in cells from damage. At the same time, selenium is also an important element in maintaining heart function. For damaged There is a repair effect on myocardial cell damage.
. Improve immunity
Selenium can have a certain influence on the function of the immune system in the body. It can promote the production of antibodies by lymphocytes and increase or maintain blood immunoglobulin levels at normal levels. It can also help activate the activity of certain enzyme elements in the body to enhance the anti-cancer effect of lymphocytes in the body.
Selenium can combine with cadmium, mercury, lead, tin and other heavy metals in the body to reduce the toxicity of heavy metals and help detoxify.
Selenium has so many functions, so is the rumor that selenium can kill cancer cells true?
2. Tsinghua University Research: Selenium can kill cancer cells
Selenium itself is an element with good biocompatibility. It is also the center of action of various oxidoreductases in the body and has the function of regulating oxidoreductases in the body. Has anti-cancer activity.
Researchers at Tsinghua University conducted a study on this basis, designing selenium-containing assemblies and coordinating selenium elements and platinum to form nanomedicine assemblies. found that selenium-containing assemblies can induce reactive oxygen species species ( ROS) levels increase, thereby effectively killing cancer cells, with strong anti-cancer activity, but relatively low toxic and side effects.
Selenium can really fight cancer? Can we achieve this effect of killing cancer cells by supplementing selenium through diet?
The answer is hard!
Dietary intake of selenium can increase the selenium in our blood, but the selenium in cells does not necessarily increase , so it is difficult to prevent cancer.
However, from the perspective of epidemiology , there is a negative correlation between appropriate intake of selenium and the incidence of certain cancers . Some scholars conducted a 6-year selenium supplementation intervention trial in the high-incidence area of liver cancer in Qidong, Jiangsu Province, and found that the incidence of liver cancer dropped significantly.
Selenium is one of the indispensable nutrients for our body, but in life we rarely hear doctors prescribing selenium supplements. Why is this?
3. Since selenium is so important, why do doctors rarely ask patients to take selenium supplements? Selenium overdose.
Nutritionist Zhang Tian of the Nutrition Department of China Medical University Aviation General Hospital said that if the daily diet contains sufficient meat products and seafood, the selenium intake can meet the body's needs. If you blindly supplement additional selenium, it is likely to lead to symptoms of selenium poisoning such as hair breakage/dryness and brittle nails. In severe cases, it may even lead to numbness of the limbs, hemiplegia, and even death. Daily selenium supplements must be taken with caution.
" Dietary Guidelines for Chinese Residents " recommends that adults should have a daily selenium intake of 60 micrograms. Daily needs can be met through the daily intake of seafood, meat, grains and dairy products. Generally, there is no need to purchase additional Selenium-rich food . It is worth reminding that due to the relatively high content of selenium in animal foods, vegetarians are prone to insufficient selenium intake and can appropriately purchase selenium-rich products to supplement selenium.
In our lives, which foods have higher selenium content? Follow Xiao Ai to see them one by one.
4. In daily life, it is enough to eat these foods appropriately to supplement selenium!
, marine fish
Marine fish is a food rich in selenium. The selenium element in 100g of marine fish is about 20 micrograms.
, eggs
The selenium element in an ordinary egg is about 5 to 10 micrograms, which is also a good selenium supplement food.
The selenium content in pork and beef is not low. A daily intake of 2 taels of red meat can supplement approximately 10 micrograms of selenium.
. Animal offal
Taking 100g as an example, chicken liver contains about 38.53 micrograms of selenium, and pig kidney contains 156.77 micrograms.
, cereals, beans
00g of rice contains about 2.83 micrograms of selenium, wheat flour has 7.10 micrograms, and soybeans contain 2.03 micrograms.
Selenium is certainly important for health, but we cannot overly "deify" it. Selenium taken in the diet is difficult to achieve anti-cancer effects. #HealthTruth Knowledge Plan#
Reference:
[1] "[Medicine I Say] Small Selenium Element, Great Use". The First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine. 2018-10-30
[2] "[ Youbo Micro Exhibition 2019] Li Tianyu: Research on the Self-assembly and Anti-cancer Activity of Selenium-Containing Compounds". Tsinghua University Graduate Education. 2020-07-28
[3] "Can selenium supplementation prevent cancer? Expert: Excessive intake can cause poisoning". Guangming.com.2014-09-25
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