Swanson Niacinamide 250 mg
vs
Metagenics Echinacea Synergy
Supplement Comparison

  • Vitamin B3 (Niacin): Swanson Niacinamide 250 mg has 36× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 11 nutrients compared
Bar chart: per-serving label amounts and listed forms for Swanson Niacinamide 250 mg vs Metagenics Echinacea Synergy.

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Frequently asked questions

Which active ingredients does Swanson Niacinamide 250 mg have?

  • Vitamin B3 (Niacin) appears as Niacinamide

Which active ingredients does Metagenics Echinacea Synergy have?

  • Vitamin C
  • Vitamin B3 (Niacin)
  • Ginger Extract appears as Ginger (Zingiber officinale) Rhizome Extract containing gingerols and shogaols
  • Licorice Root (Glycyrrhiza glabra) appears as Licorice (Glycyrrhiza glabra) Root Extract standardized to 25% glycyrrhizic acid
  • Echinacea appears as Echinacea (Echinacea purpurea) Aerial Parts 3:1 Extract standardized to 4% total phenols
  • Perilla (Perilla frutescens) appears as Perilla Seed Extract (Perilla frutescens) containing rosmarinic acid and luteolin

Which categories do Swanson Niacinamide 250 mg and Metagenics Echinacea Synergy belong to?

  • Single Vitamin
  • Herbal Extract

What health concerns do Swanson Niacinamide 250 mg and Metagenics Echinacea Synergy address?

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

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

  • Swanson Niacinamide 250 mg has the highest total amount of Vitamin B3 (Niacin): 250 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Swanson Niacinamide 250 mg: 1 capsule
    • Metagenics Echinacea Synergy: 1 tablet
  • Vitamin B3 (Niacin)
    • This supplement has 250 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 100 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 7 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.
  • 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