B12 (10ml)

Vitamin B12 (cobalamin) is an essential water-soluble vitamin that functions as a coenzyme in two critical enzymatic reactions in human metabolism. First, as methylcobalamin, it serves as a cofactor for methionine synthase, which converts homocysteine to methionine — a reaction critical for DNA methylation, neurotransmitter synthesis, and prevention of homocysteine accumulation. Second, as adenosylcobalamin, it serves as a cofactor for methylmalonyl-CoA mutase, which converts methylmalonyl-CoA to succinyl-CoA in the propionate catabolism pathway, feeding into the citric acid cycle. B12 deficiency impairs both reactions, leading to megaloblastic anemia (from disrupted DNA synthesis in rapidly dividing hematopoietic cells), neurological damage (from impaired myelin synthesis and possible methylation defects), and elevated homocysteine (a cardiovascular risk factor). The neurological manifestations can include peripheral neuropathy, subacute combined degeneration of the spinal cord, cognitive decline, and depression. The 10ml solution format allows for direct use without reconstitution. B12 is often included alongside peptide research protocols because many peptide-active metabolic pathways depend on adequate methylation status and mitochondrial function, both of which require B12.

Vitamin B12 (cobalamin) is an essential water-soluble vitamin that functions as a coenzyme in two critical enzymatic reactions in human metabolism. First, as methylcobalamin, it serves as a cofactor for methionine synthase, which converts homocysteine to methionine — a reaction critical for DNA methylation, neurotransmitter synthesis, and prevention of homocysteine accumulation. Second, as adenosylcobalamin, it serves as a cofactor for methylmalonyl-CoA mutase, which converts methylmalonyl-CoA to succinyl-CoA in the propionate catabolism pathway, feeding into the citric acid cycle. B12 deficiency impairs both reactions, leading to megaloblastic anemia (from disrupted DNA synthesis in rapidly dividing hematopoietic cells), neurological damage (from impaired myelin synthesis and possible methylation defects), and elevated homocysteine (a cardiovascular risk factor). The neurological manifestations can include peripheral neuropathy, subacute combined degeneration of the spinal cord, cognitive decline, and depression. The 10ml solution format allows for direct use without reconstitution. B12 is often included alongside peptide research protocols because many peptide-active metabolic pathways depend on adequate methylation status and mitochondrial function, both of which require B12.

Standard supplementation doses range from 250 mcg to 1000 mcg. Therapeutic doses for deficiency are 1000 mcg IM or SC. The 10ml solution provides a ready-to-use injectable research preparation.

Store at 2-8°C (refrigerated). Keep away from direct light. Do not freeze unless specified. Check the Certificate of Analysis for batch-specific storage recommendations and expiration dating.