Methylcobalamin (B12) vs Vitamin C (Liposomal)

Mechanism

Methylcobalamin serves as a cofactor for methionine synthase, transferring a methyl group from 5-MTHF to homocysteine to regenerate methionine and subsequently SAMe. Adenosylcobalamin (the other active B12 form) is a cofactor for methylmalonyl-CoA mutase in mitochondrial energy production and odd-chain fatty acid metabolism. B12 is essential for myelin synthesis, DNA synthesis (thymidylate synthase pathway), red blood cell maturation, and neurological function. Deficiency causes megaloblastic anemia and irreversible subacute combined degeneration of the spinal cord.

Standard Dosing

1000-5000 mcg methylcobalamin daily (sublingual preferred)

Timing

Morning, sublingual for best absorption (bypasses intrinsic factor requirement). Can combine with methylfolate.

Cycle Duration

ongoing

Side Effects

• Acne/skin breakouts (common)
• Anxiety (overmethylation in susceptible individuals)
• Diarrhea
• Headache
• Hypokalemia (during rapid repletion of severe deficiency)

Contraindications

• Leber's hereditary optic neuropathy (cyanocobalamin specifically; methylcobalamin is generally safer)
• Polycythemia vera

Best Stacking Partners

Mechanism

Ascorbic acid is an essential electron donor and cofactor for numerous enzymatic reactions. It is required for collagen synthesis (prolyl and lysyl hydroxylases), carnitine biosynthesis, catecholamine synthesis (dopamine beta-hydroxylase), and alpha-ketoglutarate-dependent dioxygenases including HIF-prolyl hydroxylases and TET methylcytosine dioxygenases (epigenetic regulation). It regenerates oxidized vitamin E, supports immune function via neutrophil chemotaxis, phagocytosis, and lymphocyte proliferation. Liposomal delivery bypasses SVCT1/2 transporter saturation, achieving plasma levels closer to IV administration.

Standard Dosing

1000-2000mg liposomal vitamin C daily

Timing

Divided doses throughout the day (every 4-6 hours) for optimal plasma levels. Away from high-dose minerals.

Cycle Duration

ongoing

Side Effects

• Diarrhea/GI upset at high non-liposomal doses (bowel tolerance)
• Kidney stone risk (oxalate pathway)
• False blood sugar readings on glucometers
• Dental erosion (chewable forms)

Contraindications

• Hemochromatosis (enhances iron absorption)
• G6PD deficiency (high-dose IV can cause hemolytic anemia)
• History of calcium oxalate kidney stones (may increase oxalate at high oral doses)
• Renal insufficiency (accumulation risk)

Best Stacking Partners