Vitamin B12

Vitamin B12 (cobalamin) is an essential water-soluble vitamin required for methylation, DNA synthesis, and normal neurologic function. Common forms sold in injectable vials include methylcobalamin, hydroxocobalamin, and cyanocobalamin.

Mechanism

• Methylation cofactor. Cofactor for methionine synthase, methylenetetrahydrofolate reductase (MTHFR) pathway.
• Erythropoiesis. Required for normal red blood cell maturation.

Common research protocols

Dosing information below reflects published research literature. It is not medical advice and is not a treatment plan.

• Clinical use. Injectable B12 is commonly used for confirmed deficiency (megaloblastic anemia, pernicious anemia, malabsorption).

Evidence at a glance

• Well-established. Deficiency causes megaloblastic anemia and, if prolonged, irreversible neurologic damage. Repletion is standard of care.
• Supplementation without deficiency. Evidence for benefit in the absence of deficiency is weak.

Reconstitution & handling

Lyophilized peptides ship as freeze-dried powder. Reconstitute with bacteriostatic water; refrigerate the reconstituted vial. Use the reconstitution calculator to get syringe-unit readings for your target dose. General reconstitution and syringe guidance in the How It Works page.

Primary-literature list for this guide available on request via contact.