Selenium is often available in multivitamin and mineral supplements. The amount of selenium is listed in micrograms/day, or µg/day. The Food and Nutrition Board of the Institute of Medicine recommends the following dietary reference intakes (DRIs) of selenium:
Women who are pregnant or breastfeeding may need slighly higher amounts. Ask your health care provider what is best for you.
Institute of Medicine, Food and Nutrition Board. Dietary Reference Intakes: Vitamin C, Vitamin E, Selenium, and Carotenoids. National Academy Press, Washington, DC, 2000.
Thomson CD. Assessment of requirements for selenium and adequacy of selenium status: a review. Eur J Clin Nutr. 2004;58:391-402.
Goldhaber SB. Trace element risk assessment: essentiality vs. toxicity. Regulatory Toxicology and Pharmacology. 2003;38:232-42.
Hathcock J. Vitamins and minerals: Efficacy and safety. Am J Clin Nutr. 1997;66:427-37.