Keshan Disease, Selenium Deficiency, and the Selenoproteome New England Journal of Medicine Selenocysteine muscle pain ** **A lack of selenium cause muscle pain mechanism of action.** Selenium exerts its biological functions via molecules called selenoproteins which contain the amino acid cysteine with Frontiers The effect of selenium on antioxidant system in aquaculture animals Role of selenium in the health, productivity and egg quality of layers and breeders PlusVet Animal Health