B12
Anti-Aging
Methylcobalamin is the neurologically active, methyl-donor form of vitamin B12 (cobalamin), differentiated from cyanocobalamin by its direct bioavailability without hepatic conversion. As a cofactor for methionine synthase and methylmalonyl-CoA mutase, methylcobalamin plays a central role in one-carbon metabolism, myelin sheath synthesis, DNA methylation, and red blood cell maturation in research models. It has been studied for its neuroprotective properties, nerve regeneration support, and involvement in homocysteine remethylation pathways and mitochondrial energy metabolism.
$45.00
In StockFor research purposes only. Not for human consumption.
Mechanism of Action
Methylcobalamin serves as the methyl-donor cofactor for cytoplasmic methionine synthase (MTR), catalyzing the remethylation of homocysteine to methionine using 5-methyltetrahydrofolate as the methyl donor. This reaction links the folate and methionine cycles, replenishing SAM (S-adenosylmethionine) for downstream methylation reactions including DNA, RNA, and myelin basic protein methylation. In mitochondria, adenosylcobalamin (a related B12 form) supports methylmalonyl-CoA mutase activity in propionate catabolism. Methylcobalamin has also been studied for direct neurotropic effects including axonal regeneration support and Schwann cell myelination signaling in peripheral nerve research models.
Research Focus Areas
- Energy production and mitochondrial metabolism research
- Nervous system health and myelination studies
- Red blood cell formation and erythropoiesis research
- Homocysteine remethylation pathway studies