OmegaVia EPA 500
vs
Natural Factors RxOmega-3 Ultra Strength
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 OmegaVia EPA 500 vs Natural Factors RxOmega-3 Ultra Strength.

Try the VIOscan dashboard demo for free

Build comparison charts in seconds – no signup or card needed

This is a free preview of the $9.99/month premium dashboard

Use the interactive demo with multivitamins samples

Try Free Demo

Frequently asked questions

Which active ingredients does OmegaVia EPA 500 have?

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

Which active ingredients does Natural Factors RxOmega-3 Ultra Strength have?

  • Eicosapentaenoic Acid (EPA) appears as Unspecified
  • Docosahexaenoic Acid (DHA) appears as Unspecified

Which categories do OmegaVia EPA 500 and Natural Factors RxOmega-3 Ultra Strength belong to?

  • Fish Oil and Omega-3

What health concerns do OmegaVia EPA 500 and Natural Factors RxOmega-3 Ultra Strength address?

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

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

  • Natural Factors RxOmega-3 Ultra Strength has the highest total amount of EPA + DHA (combined EPA+DHA content - individual amounts of EPA+DHA not specified): 2030 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • OmegaVia EPA 500: 1 softgel
    • Natural Factors RxOmega-3 Ultra Strength: 2 softgels

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