Very little: It is very difficult in america today to actually be vitamin deficient. Some folks are deficient in Folic Acid and B12 which can cause anemia, high blood homocysteine and methylmalonic acid, and rarely, pernicious anemia.
Answered 4/13/2016
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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