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Vitamin B-12 is a water-soluble vitamin that contributes to many of the bodys important functions, such as the production and function of red blood cells, nerve cells, and DNA
Legislative proposals to change this exclusion have been introduced but have not passed as of early 2026
It is composed of three amino acids: cysteine, glycine, and glutamic acid
If those values are borderline, further testing may be needed to assess methylmalonic acid (MMA) and homocysteine levels
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