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Association of vitamin B12, methylmalonic acid, and functional parameters
Sublingual methylcobalamin treatment is as effective as intramuscular and peroral cyanocobalamin in children age 0-3 years
[DOI] [PMC free article] [PubMed] [Google Scholar] 42.Greenberg AS, Egan JJ, Wek SA, Garty NB, Blanchette-Mackie EJ, Londos C
Having an injection means that the vitamin is delivered straight into the blood stream
Unlike oral supplements, B12 injections deliver the vitamin directly into your bloodstream for maximum absorption and immediate results
It uses a methyl group donated by S-adenosylmethionine (SAM) to methylate nicotinamide a vitamin B3 form that would otherwise be recycled back into NAD+
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