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Description
B12 Vitamin B12, also known as cobalamin, is an essential water-soluble vitamin that plays a key role in energy production, brain function, red blood cell formation, and DNA synthesis

To be clear: these were not individuals with a known Vitamin B deficiency
Although, such deficiency is uncommon in the United States outside of certain high risk groups

Metabolites were identified and quantified using liquid chromatographymass spectrometry (LC-MS)
