Selenium is known as an essential
trace element for humans and animals for over 30 years, although the plant does
not seem to need it. Epidemiological research caution that people with low
selenium consumption have a greater risk of cancer and cardiovascular disease.
Animal research have shown that selenium protects against cancer caused by
active metabolism of certain chemicals into cancer-causing agent by the liver:
selenium seems to induce the synthesis of enzymes that detoxify katsinogen.
A research was conducted in 65
provinces in China with a diversity of types of diseases with the goal to
support the concept that antioxidants may protect against cancer. The results
obtained there is a consistent inverse correlation between the number of cancer
deaths in 65 provinces with high levels of β-carotene, vitamin C and selenium
in the blood.
While several other studies
conducted with the goal to determine the effects of food supplements on cancer
risk in the general population to obtain different results. The results of
intervention trials conducted in non-Western populations show a beneficial
effect of combined supplementation with β-carotene, vitamin E and selenium.
However, from the two experiments conducted on Western populations, one showing
lack of benefit of supplementation of β-carotene, vitamin E or vitamin C in
prevention of colorectal adenomas.
Biochemical and epidemiological
research have shown that antioxidant nutrients and foods that contain
antioxidants likely have a significant protective effect in cancer prevention
in humans.
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