According to a program I heard yesterday, roughly 16% of Americans are deficient in Vitamin B12. There was also a related concern about deficiencies of folic acid, B6. The two are somehow related. Ref: The Health Show #1263 http://en.wikipedia.org/wiki/Folic_acid#B12_deficiency Vitamin B12, aka cobalamin, http://en.wikipedia.org/wiki/Vitamin_B12 It is important to determine if there is a deficiency and if that deficiency is related to the inability to absorb B6 or B12, which is indicative of other, potentially treatable, issues related to the digestive system. I may know at least one, possibly two people, who may have experienced B12 deficiency.