Swanson C-1000
vs
Douglas Laboratories Quercetin-Bromelain Complex
Supplement Comparison

  • Vitamin C: Swanson C-1000 has 5.0× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 9 nutrients compared
Bar chart: per-serving label amounts and listed forms for Swanson C-1000 vs Douglas Laboratories Quercetin-Bromelain Complex.

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Frequently asked questions

Which active ingredients does Swanson C-1000 have?

  • Vitamin C appears as Ascorbic Acid
  • Rose Hips Powder

Which active ingredients does Douglas Laboratories Quercetin-Bromelain Complex have?

  • Vitamin C appears as Magnesium Ascorbate
  • Magnesium appears as Magnesium Ascorbate
  • Quercetin appears as Quercetin Dihydrate
  • Bromelain appears as Bromelain (Ananas comosus stem)

Which categories do Swanson C-1000 and Douglas Laboratories Quercetin-Bromelain Complex belong to?

  • Single Vitamin
  • Antioxidant Complex
  • Herbal Extract

What health concerns do Swanson C-1000 and Douglas Laboratories Quercetin-Bromelain Complex address?

  • Antioxidant Support
  • Eye Health
  • Heart & Cardiovascular Health
  • Immune System Support
  • Respiratory Health

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

  • Swanson C-1000 has the highest total amount of Vitamin C: 1000 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Swanson C-1000: 1 capsule
    • Douglas Laboratories Quercetin-Bromelain Complex: 1 tablet
  • Vitamin C
    • This supplement has 1000 mg
    • Recommended Dietary Allowance in men: 90 mg
    • Recommended Dietary Allowance in women: 75 mg
    • Tolerable Upper Intake Level: 2000 mg
  • Vitamin C
    • This supplement has 200 mg
    • Recommended Dietary Allowance in men: 90 mg
    • Recommended Dietary Allowance in women: 75 mg
    • Tolerable Upper Intake Level: 2000 mg

Last updated: February 4, 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