Methylcobalamin is the active coenzyme form of B12 (vs cyanocobalamin which must be converted). Better retained by tissues than cyanocobalamin. 1,000-5,000μg sublingual for deficiency correction. CRITICAL for: vegans (zero dietary B12), elderly (reduced intrinsic factor), metformin users (depletes B12), PPI users (reduced absorption). Hydroxocobalamin injection is preferred for severe deficiency. --- *Reviewed by the Dose AI Research Team and Clinical Advisory Board* *Last updated: 2026-04-06*
Reviewed by the Scan Dose Research Team and Clinical Advisory Board | Last updated:
Not medical advice. Based on published clinical research and systematic reviews.