Swanson Super DHA 500
vs
Nordic Naturals EPA Xtra
Supplement Comparison

  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 6 nutrients compared
Bar chart: per-serving label amounts and listed forms for Swanson Super DHA 500 vs Nordic Naturals EPA Xtra.

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Frequently asked questions

Which active ingredients does Swanson Super DHA 500 have?

  • Eicosapentaenoic Acid (EPA) appears as Ethyl Esters (EE)
  • Docosahexaenoic Acid (DHA) appears as Ethyl Esters (EE)

Which active ingredients does Nordic Naturals EPA Xtra have?

  • Eicosapentaenoic Acid (EPA) appears as Re-esterified Triglycerides (rTG)
  • Docosahexaenoic Acid (DHA) appears as Re-esterified Triglycerides (rTG)

Which categories do Swanson Super DHA 500 and Nordic Naturals EPA Xtra belong to?

  • Fish Oil and Omega-3

What health concerns do Swanson Super DHA 500 and Nordic Naturals EPA Xtra address?

  • Anti-Inflammatory Support
  • Brain, Focus & Cognitive Function
  • Eye Health
  • Heart & Cardiovascular Health
  • General Health
  • Joint & Bone Health

Which product has a higher amount of EPA + DHA (combined EPA+DHA content - individual amounts of EPA+DHA not specified) per serving?

  • Nordic Naturals EPA Xtra has the highest total amount of EPA + DHA (combined EPA+DHA content - individual amounts of EPA+DHA not specified): 1320 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Swanson Super DHA 500: 1 softgel
    • Nordic Naturals EPA Xtra: 2 tablets

Last updated: February 3, 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