B12

Volume Pricing

Price per pack (10 vials). Discount applies to this compound only – no mix and match.

B12 — Cyanocobalamin | Essential Cofactor for Neurological & Hematological Function

Vitamin B12 (cyanocobalamin) is a water-soluble, cobalt-containing vitamin and essential cofactor in two critical enzymatic reactions in human physiology: the conversion of homocysteine to methionine (via methionine synthase, requiring methylcobalamin) and the conversion of methylmalonyl-CoA to succinyl-CoA (via methylmalonyl-CoA mutase, requiring adenosylcobalamin). Neither reaction proceeds without adequate B12 — making it indispensable for DNA synthesis, myelin sheath maintenance, red blood cell maturation, and one-carbon metabolism. Cyanocobalamin is the most chemically stable synthetic form of B12 and is converted endogenously to the active coenzyme forms methylcobalamin and adenosylcobalamin following cellular uptake and de-cyanation.

Injectable B12 bypasses the enteric absorption pathway entirely, making it the standard research and clinical delivery method for studying B12 repletion, neurological recovery, and hematological normalization — particularly in models where oral absorption is impaired.

Why Injectable Cyanocobalamin Is the Reference Standard

Oral B12 absorption is a highly gatekept process: it requires binding to intrinsic factor (IF) secreted by gastric parietal cells, followed by IF-receptor-mediated uptake in the terminal ileum. Any disruption to this pathway — parietal cell dysfunction, IF deficiency, gastric bypass, ileal disease, achlorhydria, or simple age-related gastric atrophy — results in deficiency regardless of dietary intake.

Intramuscular or subcutaneous injection bypasses IF-dependency entirely, delivering B12 directly into circulation for cellular uptake via transcobalamin II. This makes injectable cyanocobalamin the definitive route for research models examining B12 deficiency states and repletion kinetics.

Research Applications

B12 injectable is used in studies examining:

• B12 deficiency repletion kinetics — serum cobalamin, methylmalonic acid (MMA), and homocysteine normalization timescales following IM/SC injection
• Neurological recovery in subacute combined degeneration and peripheral neuropathy models
• Megaloblastic anemia reversal and erythropoietic normalization — RBC morphology, reticulocyte response, and hemoglobin recovery
• Homocysteine lowering and cardiovascular risk factor modulation (in combination with folate and B6)
• One-carbon metabolism and methylation pathway research
• Energy metabolism — succinyl-CoA entry into TCA cycle and mitochondrial function in methylmalonyl-CoA mutase-dependent models
• Neuroprotection and nerve regeneration support in combined stacks with peptides acting on tissue repair pathways
• Absorption-independent delivery models in gastric bypass, atrophic gastritis, and intrinsic factor deficiency research designs
• Aging-associated B12 decline — prevalence, threshold serum levels, and functional deficit onset

Specifications

Reconstitution

B12 reconstitutes readily in bacteriostatic water. Add BAC water slowly against the inside vial wall and swirl gently to dissolve — the solution will take on a characteristic deep red/pink color, which is normal and expected for cyanocobalamin. Do not shake.

Total mg ÷ Volume added (mL) = Concentration (mg/mL)

Example: 1mg + 1mL BAC water = 1mg/mL — each 0.1mL = 100mcg Example: 1mg + 2mL BAC water = 0.5mg/mL — each 0.1mL = 50mcg Example: 1mg + 0.5mL BAC water = 2mg/mL — each 0.1mL = 200mcg

Reconstituted B12 should be stored at 2–8°C, protected from light (cyanocobalamin is photosensitive — wrap vial in foil if needed), and used within 28–30 days.

Protocol Notes

Injectable B12 dosing in research contexts follows well-characterized clinical repletion models. The IM/SC route produces rapid, dose-proportional serum saturation, with excess B12 excreted renally — the therapeutic window is wide and supraphysiological dosing is routinely used in clinical settings.

Typical research dosing framework:

• Repletion / deficiency correction model: 1,000mcg (1mg) IM or SC daily for 7 days, then weekly for 4 weeks, then monthly — mirrors standard clinical repletion protocol
• Maintenance / optimization model: 250–1,000mcg weekly or biweekly SC
• High-dose neurological model: 1,000–2,000mcg daily or EOD for acute neuropathy-adjacent endpoints
• Frequency: Daily, EOD, weekly, or monthly depending on research endpoint and deficiency severity model
• Route: IM (faster peak serum levels, traditional clinical route) or SC (slower absorption, equivalent efficacy over 24–48 hours)
• Cycle: No required off-cycle — B12 is water-soluble with renal clearance of excess; continuous dosing protocols are standard

Commonly observed effects in research models:

• Hematological: Reticulocyte count rise within 5–7 days of repletion initiation in deficiency models; megaloblast normalization within 2–4 weeks; hemoglobin recovery over 6–8 weeks
• Neurological: Subacute combined degeneration recovery is slower — peripheral neuropathy symptoms may improve over weeks to months; central spinal cord changes show more variable reversal timelines
• Metabolic markers: Homocysteine and methylmalonic acid (MMA) levels fall within days of repletion — used as primary biomarker endpoints in most B12 research designs
• Injection site: Mild, transient discomfort; no significant local reaction expected at standard doses
• General: Energy and fatigue markers commonly tracked as secondary endpoints in deficiency-state research models

Research Stacks

B12 is commonly paired in research settings with:

• Glutathione — Vitamin B12 participates in methionine and homocysteine metabolism; glutathione is a downstream product of transsulfuration, and the two are co-studied in models examining methylation capacity and antioxidant status.
• Lipo-C — Lipo-C formulations combine lipotropic cofactors that support hepatic fat metabolism; B12 is a standard inclusion given its role in one-carbon metabolism and its synergy with methionine and choline-related pathways.
• NAD+ — Both B12 and NAD+ are coenzymes in cellular energy transfer; research models pairing them examine additive effects on mitochondrial electron transport and metabolic cofactor availability.

Purity Guarantee

Every batch is ≥99% purity. If you independently test your compound and the results don’t match — send us the COA and we’ll issue store credit, no questions asked.