China's tea culture has a long history, has a history of thousands of years, tea is not just a conventional drink, many times can also be used medicinally, the ancient book "Shennong Materia Medica" mentioned that tea "makes people think, less lying, light, blind"
Tea is rich in tea polysaccharides, tea polyphenols, caffeine, vitamins and other nutrients, so it is deeply loved by health groups, and there are research data showing that tea, especially green tea, has the effect of refreshing anti-fatigue and preventing cardiovascular and cerebrovascular diseases, and especially selenium-rich green tea.
Selenium element is indispensable to the human body, selenium element can enhance the body's immunity, protect the health of cardiovascular and cerebrovascular diseases, in the past China often appeared in the large osteoarthritis and cataracts and cardiovascular and cerebrovascular diseases and selenium deficiency related, so selenium supplementation for improving the health of the people has great significance.
Cancer is a disease with a very high mortality rate, there are many carcinogens in social life, a large number of research data show that the carcinogenicity of these substances and genetic mutations have a great relationship, so in a sense, reducing genes can suddenly significantly reduce the emergence of tumor cells.
National Geographic studies have shown that the incidence and mortality of cancer are inversely correlated with the geographical distribution of selenium, that is, the higher the selenium content, the less likely it is to develop cancer, especially skin cancer and gastrointestinal cancer.
However, as far as selenium supplementation is concerned, sodium selenite in inorganic selenium is highly toxic, so it is not suitable for direct feeding. Plant selenium has become the main source of selenium for humans, and the current plant transformation of plant selenium is mainly divided into two ways: natural selenium-rich and artificial selenium-rich.
In the 1980s, scientists have found that the soils of Ziyang, Shaanxi and Enshi, Hubei province, have a high content of selenium, and the wheat, rice and tea produced in these two places have a high content of selenium, but for now, most of China is still a selenium-deficient area, so the natural selenium-rich land is limited.
Natural selenium-rich tea is mainly produced in high selenium areas, generally according to the selenium content in tea, selenium content <0.10mg/kg for low selenium tea, 0.10~0.35mg/kg for medium selenium tea, 0.35~5.00mg/kg for selenium-rich tea, >5.00mg/kg for high selenium tea,
Selenium-rich tea has three main abilities:
1. Antioxidant capacity
The ability of selenium-rich green tea to inhibit linoleic acid oxidation and scavenging free radicals is much higher than that of conventional tea, and within a certain range, the higher the selenium content in tea, the stronger the antioxidant ability.
2. Anti-tumor ability
According to animal experimental data, selenium-rich tea contains high anti-cancer activity, so the anti-cancer resistance is much higher than that of conventional tea plus selenite.
3. Anti-mutation ability
Foreign data studies have shown that the extracts in selenium-rich tea have significant anti-mutation and anti-colon cancer activity, so reducing mutability also reduces the possibility of cancer to a certain extent.