21st Century Mega Multi for Men
vs
Metagenics Vitamin B-Complex
Supplement Comparison

  • Vitamin C: 21st Century Mega Multi for Men has 2.4× more
  • Vitamin B12 (Cobalamin): Metagenics Vitamin B-Complex has 8.3× more
  • Vitamin B9 (Folate): 21st Century Mega Multi for Men has 0.30% more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 57 nutrients compared
Bar chart: per-serving label amounts and listed forms for 21st Century Mega Multi for Men vs Metagenics Vitamin B-Complex.

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Frequently asked questions

Which active ingredients does 21st Century Mega Multi for Men 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) appears as 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 D-Calcium Pantothenate
  • Choline appears as Choline Bitartrate
  • PABA
  • Calcium appears as Calcium Citrate
  • Iodine appears as Potassium Iodide
  • Magnesium appears as Magnesium Oxide
  • Zinc appears as Zinc Oxide
  • Selenium appears as Selenium Yeast
  • Copper appears as Copper Oxide
  • Manganese appears as Manganese Gluconate
  • Chromium appears as Chromium Picolinate
  • Silicon appears as Silicon Dioxide
  • Lutein
  • Lycopene
  • Inositol
  • Alpha Lipoic Acid
  • Citrus Bioflavonoid Complex
  • Korean Ginseng
  • L-Cysteine
  • Saw Palmetto
  • Stinging Nettle (Urtica dioica) Root
  • Garlic (Allium sativum)
  • Damiana (Turnera aphrodisiaca) Leaf
  • Oat Straw (Avena sativa) Aerial
  • Oyster Extract
  • Pumpkin (Cucurbita pepo) Seed
  • dl-Methionine

Which active ingredients does Metagenics Vitamin B-Complex have?

  • Vitamin C appears as Ascorbic Acid
  • Vitamin B1 (Thiamin) appears as Thiamin Mononitrate
  • Vitamin B2 (Riboflavin)
  • Vitamin B3 (Niacin) appears as Niacinamide and Niacin
  • Vitamin B6 (Pyridoxine) appears as Pyridoxine HCl
  • Vitamin B9 (Folate) appears as Calcium L-5-Methyltetrahydrofolate
  • Vitamin B12 (Cobalamin) appears as Methylcobalamin
  • Vitamin B7 (Biotin)
  • Vitamin B5 (Pantothenic Acid) appears as D-Calcium Pantothenate
  • Choline appears as Choline Bitartrate
  • PABA
  • Inositol appears as Myo-Inositol

Which categories do 21st Century Mega Multi for Men and Metagenics Vitamin B-Complex belong to?

  • Multivitamin
  • B-Complex Formula

What health concerns do 21st Century Mega Multi for Men and Metagenics Vitamin B-Complex address?

  • Antioxidant Support
  • Energy & Metabolism
  • General Health
  • Immune System Support
  • Men's Health

Which product has a higher amount of Vitamin C per serving?

  • 21st Century Mega Multi for Men has the highest total amount of Vitamin C: 300 mg per serving

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

  • Metagenics Vitamin B-Complex has the highest total amount of Vitamin B12 (Cobalamin): 250 mcg per serving

Which product has a higher amount of Vitamin B9 (Folate) per serving?

  • 21st Century Mega Multi for Men has the highest total amount of Vitamin B9 (Folate): 667 mcg DFE per serving

Which product has a higher amount of Choline per serving?

  • Metagenics Vitamin B-Complex has the highest total amount of Choline: 100 mg per serving

Which product has a higher amount of Vitamin B6 (Pyridoxine) per serving?

  • 21st Century Mega Multi for Men has the highest total amount of Vitamin B6 (Pyridoxine): 30 mg per serving

Which product has a higher amount of Vitamin B3 (Niacin) per serving?

  • Metagenics Vitamin B-Complex has the highest total amount of Vitamin B3 (Niacin): 200 mg per serving

Which product has a higher amount of Vitamin B1 (Thiamin) per serving?

  • 21st Century Mega Multi for Men has the highest total amount of Vitamin B1 (Thiamin): 30 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • 21st Century Mega Multi for Men: 2 tablets
    • Metagenics Vitamin B-Complex: 1 tablet
  • Vitamin A
    • This supplement has 3000 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 300 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 200 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 67 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 75 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 30 mg
    • Recommended Dietary Allowance in men: 1.2 mg
    • Recommended Dietary Allowance in women: 1.1 mg
    • Tolerable Upper Intake Level: Not established
  • Vitamin C
    • This supplement has 125 mg
    • Recommended Dietary Allowance in men: 90 mg
    • Recommended Dietary Allowance in women: 75 mg
    • Tolerable Upper Intake Level: 2000 mg
  • Vitamin B1 (Thiamin)
    • This supplement has 14 mg
    • Recommended Dietary Allowance in men: 1.2 mg
    • Recommended Dietary Allowance in women: 1.1 mg
    • Tolerable Upper Intake Level: Not established
  • Vitamin B2 (Riboflavin)
    • This supplement has 16 mg
    • Recommended Dietary Allowance in men: 1.3 mg
    • Recommended Dietary Allowance in women: 1.1 mg
    • Tolerable Upper Intake Level: Not established
  • Vitamin B3 (Niacin)
    • This supplement has 200 mg
    • Recommended Dietary Allowance in men: 16 mg
    • Recommended Dietary Allowance in women: 14 mg
    • Tolerable Upper Intake Level: 35 mg
  • Vitamin B6 (Pyridoxine)
    • This supplement has 22 mg
    • Recommended Dietary Allowance in men: 1.3 mg
    • Recommended Dietary Allowance in women: 1.3 mg
    • Tolerable Upper Intake Level: 100 mg
  • Vitamin B9 (Folate)
    • This supplement has 665 mcg DFE
    • Recommended Dietary Allowance in men: 400 mcg DFE
    • Recommended Dietary Allowance in women: 400 mcg DFE
    • Tolerable Upper Intake Level: 1000 mcg DFE

Last updated: February 20, 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.
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  • Author: VIOscan Research Team