http://articles.mercola.com/sites/articles/archive/2003/06/04/selenium-part-six.aspxLow blood levels of selenium are a risk factor for the progression of Barrett’s esophagus, a precancerous condition, according to a study. Researchers found that patients with Barrett’s esophagus who had low selenium levels were at a two- to three-foldenCommunityServer 2008.5 SP1 (Build: 31106.3070)