vitamin b12 injections for pernicious anemia Injection at a Licensed Pharmacy Cyanocobalamin Injection – 1000 mcg/mL

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NNMT catalyzes the transfer of a methyl group from S-adenosylmethionine (SAM, the universal methyl donor in cells) to nicotinamide (a form of vitamin B3 and a precursor for NAD+ synthesis), producing 1-methylnicotinamide and S-adenosylhomocysteine (SAH)

Although the vitamin sounds like a single vitamin, there are in fact eight B vitamins that are more of less prevalent in different foodstuffs, and regularly added as fortification to breads and cereals, for example - thiamin (B1), riboflavin (B2), niacin (B3), pantothenic acid (B5), pyridoxine (B6), biotin (B7), folate/folacin or folic acid (B9) and cobalamins (B12)