Editing Selenium (section)

==== Nutritional sources of selenium ====
Dietary selenium comes from meat, nuts, cereals, and mushrooms. [[Brazil nut]]s are the richest dietary source (though this is soil-dependent since the Brazil nut does not require high levels of the element for its own needs).<ref>{{cite journal |last1=Barclay |first1=Margaret N. I. |last2=MacPherson |first2=Allan |last3=Dixon |first3=James |date=1995 |title=Selenium content of a range of UK food |journal=Journal of Food Composition and Analysis |volume=8 |issue=4 |pages=307–318 |doi=10.1006/jfca.1995.1025}}</ref><ref>{{cite web |title=Selenium Fact Sheet |url=http://ods.od.nih.gov/factsheets/selenium.asp#h2 |publisher=The Office of Dietary Supplements, [[National Institutes of Health]] |place=United States}} Includes a list of selenium-rich foods.</ref>

The US [[Recommended Dietary Allowance]] (RDA) of selenium for teenagers and adults is 55&nbsp;[[Microgram|μg]]/day. Selenium as a dietary supplement is available in many forms, including multi-vitamins/mineral supplements, which typically contain 55 or 70&nbsp;μg/serving. Selenium-specific supplements typically contain either 100 or 200&nbsp;μg/serving.{{Citation needed|date=June 2024}} In June 2015, the US [[Food and Drug Administration]] (FDA) published its final rule establishing a requirement for minimum and maximum levels of selenium in [[infant formula]].<ref>{{Cite web |title=FDA Issues Final Rule to Add Selenium to List of Required Nutrients for Infant Formula |url=https://www.fda.gov/Food/NewsEvents/ConstituentUpdates/ucm451982.htm |url-status=dead |archive-url=https://wayback.archive-it.org/7993/20171114120142/https://www.fda.gov/Food/NewsEvents/ConstituentUpdates/ucm451982.htm |archive-date=November 14, 2017 |access-date=2015-09-10 |publisher=Food and Drug Administration |df=mdy-all}}</ref>