Vitamin B12 (cobalamin)
Vitamin B12 (cobalamin) explained
Vitamin B12 supports red blood cell formation, nerve function, and DNA synthesis; deficiency is common in vegan diets and malabsorption.
Not FDA ApprovedVitamin B12 (cobalamin) helps treat
• B12 deficiency and pernicious anemia (with clinician)
• Neuropathy from deficiency (support)
• Energy support in deficiency
additional medications
• Dietary sources or fortified foods
• Comprehensive anemia workup if symptomatic
• B‑complex if multiple deficiencies
medication risks
• Hypokalemia when rapidly correcting severe anemia (rare—medical setting)
• Allergy (rare)
side effects
• Acne/rosacea flare (rare)
• Diarrhea
• Restlessness (rare)
FAQs
Q: Forms?A: Cyanocobalamin and methylcobalamin are common; both correct deficiency.
Q: Routes?
A: Oral, sublingual, or injections—follow clinician guidance.
Q: Masking by folate?
A: High folate can mask B12 deficiency—check labs.
Q: Interactions?
A: Metformin and PPIs can reduce B12—monitor levels.
Q: FDA approval?
A: Supplements aren’t FDA‑approved to treat disease.
