http://articles.mercola.com/sites/articles/archive/2004/11/24/vitamin-b12-deficiency-part-two.aspxGetting tested for vitamin B12 deficiency is extremely important; however, scientists have indicated that the standard test -- measuring blood levels -- may not be sensitive enough to detect a deficiency. Due to this insensitivity, scientists have discoveredenCommunityServer 2008.5 SP1 (Build: 31106.3070)