Beneficial Effects of Selenium and Its Supplementation on Carcinogenesis and the Use of Nanoselenium in the Treatment of Malignant Tumors.

Selenium was recognized as a non-toxic element in the second half of the 20th century. Since then, the positive impact of selenium on the functioning of the human body has been noticed. It has been shown that low levels of selenium in the body are significantly associated with a higher risk of developing cancer.