
Selenium deficiency is relatively rare in healthy well-nourished individuals. Few cases in humans have been reported. ==Causes== It can occur in patients with severely compromised intestinal function, those undergoing total parenteral nutrition, those who have had gastrointestinal bypass surgery, and also on advanced aged people (over 90). Alterna...
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http://en.wikipedia.org/wiki/Selenium_deficiency

deficiency of the essential mineral selenium causes keshan disease, a fatal form of cardiomyopathy (disease of the heart muscle) first observed in keshan province in china and since found elsewhere. According to the national academy of sciences, the recommended dietary allowances of selenium are 70 milligrams per day for men and 55 milligrams per d...
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http://www.encyclo.co.uk/local/20973

Selenium deficiency: See Deficiency, selenium.
Found on
http://www.medterms.com/script/main/art.asp?articlekey=5446
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