Life Extension Vitamin B12 Methylcobalamin
vs
Swanson Vitamin B12 Cyanocobalamin
Supplement Comparison

  • Vitamin B12 (Cobalamin): same total amount on both labels
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 2 nutrients compared
Bar chart: per-serving label amounts and listed forms for Life Extension Vitamin B12 Methylcobalamin vs Swanson Vitamin B12 Cyanocobalamin.

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Frequently asked questions

Which active ingredients does Life Extension Vitamin B12 Methylcobalamin have?

  • Vitamin B12 (Cobalamin) appears as Methylcobalamin

Which active ingredients does Swanson Vitamin B12 Cyanocobalamin have?

  • Vitamin B12 (Cobalamin) appears as Cyanocobalamin

Which categories do Life Extension Vitamin B12 Methylcobalamin and Swanson Vitamin B12 Cyanocobalamin belong to?

  • Single Vitamin

What health concerns do Life Extension Vitamin B12 Methylcobalamin and Swanson Vitamin B12 Cyanocobalamin address?

  • General Health
  • Heart & Cardiovascular Health
  • Neurological Support
  • Energy & Metabolism

Which product has a higher amount of Vitamin B12 (Cobalamin) per serving?

  • Both products list the same total amount of Vitamin B12 (Cobalamin) per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Life Extension Vitamin B12 Methylcobalamin: 1 lozenge
    • Swanson Vitamin B12 Cyanocobalamin: 1 capsule
  • Vitamin B12 (Cobalamin)
    • This supplement has 500 mcg
    • Recommended Dietary Allowance in men: 2.4 mcg
    • Recommended Dietary Allowance in women: 2.4 mcg
    • Tolerable Upper Intake Level: Not established
  • Vitamin B12 (Cobalamin)
    • This supplement has 500 mcg
    • Recommended Dietary Allowance in men: 2.4 mcg
    • Recommended Dietary Allowance in women: 2.4 mcg
    • Tolerable Upper Intake Level: Not established

Last updated: January 31, 2026

  • Sources & Methodology: Nutrient data and forms are taken directly from Supplement Facts labels. Reviewed and standardized by the VIOscan Research Team. Learn more on the Methodology page.
  • We show the Recommended Dietary Allowance (RDA) when available. If no RDA exists, we show the Adequate Intake (AI). Tolerable Upper Intake Levels (UL) are used for upper limits. Unless otherwise noted, RDAs shown correspond to healthy adults aged 19–50 years and are sex-specific. Separate values exist for 51–70 years and >70 years, and pregnancy and lactation are excluded. All values come from the Dietary Reference Intakes (DRIs) published by the National Academies of Sciences, Engineering, and Medicine (NASEM), Food and Nutrition Board (FNB).
  • Transparency: We’re funded by our users. We don’t have sponsors or affiliate links, and we don’t sell supplements.
  • Editorial standards: we provide independent, impartial and objective data analysis.
  • This analysis is for educational purposes only. It is not a substitute for medical advice.
  • Questions? Read our Frequently Asked Questions or contact us, we’re here to help.
  • See an error? Report it through our Contact page.
  • Author: VIOscan Research Team