selenium deficiency can lead to a number disease conditions, including cancer

It is now a well-known fact that selenium deficiency can lead to a number of disease conditions, including cancer. A possible protective effect of selenium against human malignancy was first suggested in 1969, after the observation of a decreased cancer incidence in populations within the United States with a higher selenium intake.

Over the last several decades selenium deficiency has been identified in many disease conditions and research is in progress to correct this through selenium supplementation both orally and as an injectable.

Selenium supplementation investigations have focused on the use of both organic selenium as well as inorganic selenium. A number of companies market selenium supplements containing a low dosage of selenium, in line with guidance from regulatory agencies world-wide.