Swanson Niacinamide 500 mg
vs
Metagenics Ultra Potent-C Vitamin C
Supplement Comparison

  • Vitamin B3 (Niacin): Swanson Niacinamide 500 mg has 29× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 7 nutrients compared
Bar chart: per-serving label amounts and listed forms for Swanson Niacinamide 500 mg vs Metagenics Ultra Potent-C Vitamin C.

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Frequently asked questions

Which active ingredients does Swanson Niacinamide 500 mg have?

  • Vitamin B3 (Niacin) appears as Niacinamide

Which active ingredients does Metagenics Ultra Potent-C Vitamin C have?

  • Vitamin C appears as Ascorbic Acid
  • Vitamin B3 (Niacin) appears as Nicotinic Acid
  • L-Lysine appears as L-Lysine Monohydrochloride
  • Citrus Bioflavonoid Complex

Which categories do Swanson Niacinamide 500 mg and Metagenics Ultra Potent-C Vitamin C belong to?

  • Single Vitamin

What health concerns do Swanson Niacinamide 500 mg and Metagenics Ultra Potent-C Vitamin C address?

  • Energy & Metabolism
  • Heart & Cardiovascular Health
  • Immune System Support

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

  • Swanson Niacinamide 500 mg has the highest total amount of Vitamin B3 (Niacin): 500 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Swanson Niacinamide 500 mg: 1 capsule
    • Metagenics Ultra Potent-C Vitamin C: 1 tablet
  • Vitamin B3 (Niacin)
    • This supplement has 500 mg
    • Recommended Dietary Allowance in men: 16 mg
    • Recommended Dietary Allowance in women: 14 mg
    • Tolerable Upper Intake Level: 35 mg
  • Vitamin C
    • This supplement has 250 mg
    • Recommended Dietary Allowance in men: 90 mg
    • Recommended Dietary Allowance in women: 75 mg
    • Tolerable Upper Intake Level: 2000 mg
  • Vitamin B3 (Niacin)
    • This supplement has 17.5 mg
    • Recommended Dietary Allowance in men: 16 mg
    • Recommended Dietary Allowance in women: 14 mg
    • Tolerable Upper Intake Level: 35 mg

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