vitamin B12

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vitamin B12 Cobalamin, a water-soluble vitamin, which is an essential factor in nucleic acid synthesis. Vitamin B12 may affect vitamin C absorption. It is found primarily in liver and yeast, and it is easily destroyed by cooking. Deficiency of vitamin B12 leads to megaloblastic anemia, as can be seen in pernicious anemia. The daily adult requirement is 2 micrograms.