Swanson Multi Adults 50+
vs
21st Century Vitamin B-12 1000 mcg
Supplement Comparison

  • Calcium: Swanson Multi Adults 50+ has 48% more
  • Vitamin B12 (Cobalamin): 21st Century Vitamin B-12 1000 mcg has 149× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 40 nutrients compared
Bar chart: per-serving label amounts and listed forms for Swanson Multi Adults 50+ vs 21st Century Vitamin B-12 1000 mcg.

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Frequently asked questions

Which active ingredients does Swanson Multi Adults 50+ have?

  • Vitamin A appears as Beta Carotene
  • Vitamin C appears as Ascorbic Acid
  • Vitamin D appears as Cholecalciferol (D3)
  • Vitamin E appears as d-Alpha Tocopheryl Acid Succinate
  • Vitamin K appears as Vitamin K1 Phytonadione
  • Vitamin B1 (Thiamin) appears as Thiamin Mononitrate
  • Vitamin B2 (Riboflavin)
  • Vitamin B3 (Niacin) appears as Niacinamide
  • Vitamin B6 (Pyridoxine) appears as Pyridoxine HCl
  • Vitamin B9 (Folate) appears as Folic Acid
  • Vitamin B12 (Cobalamin) appears as Cyanocobalamin
  • Vitamin B7 (Biotin)
  • Vitamin B5 (Pantothenic Acid) appears as Calcium Pantothenate
  • Calcium appears as DiCalcium Phosphate
  • Phosphorus
  • Iodine
  • Zinc appears as Zinc Oxide
  • Selenium appears as Sodium Selenite
  • Copper appears as Copper Gluconate
  • Manganese appears as Manganese Sulfate
  • Chromium appears as TRAACS Chromium Nicotinate Glycinate (Albion)
  • Molybdenum
  • Potassium
  • Lutein

Which active ingredients does 21st Century Vitamin B-12 1000 mcg have?

  • Vitamin B12 (Cobalamin) appears as Cyanocobalamin
  • Calcium appears as Calcium Carbonate

Which categories do Swanson Multi Adults 50+ and 21st Century Vitamin B-12 1000 mcg belong to?

  • Multivitamin
  • Single Vitamin

What health concerns do Swanson Multi Adults 50+ and 21st Century Vitamin B-12 1000 mcg address?

  • General Health
  • Healthy Aging & Longevity

Which product has a higher amount of Calcium per serving?

  • Swanson Multi Adults 50+ has the highest total amount of Calcium: 148 mg per serving

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

  • 21st Century Vitamin B-12 1000 mcg has the highest total amount of Vitamin B12 (Cobalamin): 1000 mcg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Swanson Multi Adults 50+: 1 tablet
    • 21st Century Vitamin B-12 1000 mcg: 1 tablet
  • Vitamin A
    • This supplement has 1830 mcg RAE
    • Recommended Dietary Allowance in men: 900 mcg RAE
    • Recommended Dietary Allowance in women: 700 mcg RAE
    • Tolerable Upper Intake Level: 3000 mcg RAE
  • Vitamin C
    • This supplement has 57 mg
    • Recommended Dietary Allowance in men: 90 mg
    • Recommended Dietary Allowance in women: 75 mg
    • Tolerable Upper Intake Level: 2000 mg
  • Vitamin D
    • This supplement has 400 IU
    • Recommended Dietary Allowance in men: 600 IU
    • Recommended Dietary Allowance in women: 600 IU
    • Tolerable Upper Intake Level: 4000 IU
  • Vitamin E
    • This supplement has 20 mg
    • Recommended Dietary Allowance in men: 15 mg
    • Recommended Dietary Allowance in women: 15 mg
    • Tolerable Upper Intake Level: 1000 mg
  • Vitamin K
    • This supplement has 24 mcg
    • Adequate Intake in men: 120 mcg
    • Adequate Intake in women: 90 mcg
    • Tolerable Upper Intake Level: Not established
  • Vitamin B1 (Thiamin)
    • This supplement has 1.5 mg
    • Recommended Dietary Allowance in men: 1.2 mg
    • Recommended Dietary Allowance in women: 1.1 mg
    • Tolerable Upper Intake Level: Not established
  • Vitamin B12 (Cobalamin)
    • This supplement has 1000 mcg
    • Recommended Dietary Allowance in men: 2.4 mcg
    • Recommended Dietary Allowance in women: 2.4 mcg
    • Tolerable Upper Intake Level: Not established
  • Calcium
    • This supplement has 100 mg
    • Recommended Dietary Allowance in men: 1000 mg
    • Recommended Dietary Allowance in women: 1000 mg
    • Tolerable Upper Intake Level: 2500 mg

Last updated: February 4, 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