Why was this study done?

There are areas of the world where selenium deficiency (Kashan’s disease) is prevalent due to lack of selenium in the soil. This study was designed to help determine the amount of selenium necessary for health.

What did the study find?

This study determined that 50 mcg of selenium may necessary for people living in regions where the mineral is deficient.

Effect of Selenium Supplements on the Selenium Levels and Glutathione Peroxidase Activity of Residents in a Selenium-Deficient Area of Hebei Province, People’s Republic of China
Authors: Wei H, et al. Fed Proc, 1984. 43(473).
PDF Abstract: Fed Proc, 1984.