Douglas Laboratories Hydrolyzed Collagen+
vs
Douglas Laboratories Quercetin-Bromelain Complex
Supplement Comparison

  • Vitamin C: Douglas Laboratories Quercetin-Bromelain Complex has 4.0× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 19 nutrients compared
Bar chart: per-serving label amounts and listed forms for Douglas Laboratories Hydrolyzed Collagen+ vs Douglas Laboratories Quercetin-Bromelain Complex.

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Frequently asked questions

Which active ingredients does Douglas Laboratories Hydrolyzed Collagen+ have?

  • Vitamin C appears as Ascorbic Acid
  • Zinc appears as Zinc Gluconate
  • Copper appears as Copper Gluconate
  • Collagen Peptides appears as VERISOL Bioactive Collagen Peptides
  • Ceramides appears as HydroPeach Ceramides (peach fruit extract standardized to 3% glycosphingolipids)
  • Hyaluronic Acid appears as Hyaluronic Acid from Sodium Hyaluronate
  • Protein

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 Douglas Laboratories Hydrolyzed Collagen+ and Douglas Laboratories Quercetin-Bromelain Complex belong to?

  • Collagen
  • Antioxidant Complex
  • Herbal Extract

What health concerns do Douglas Laboratories Hydrolyzed Collagen+ and Douglas Laboratories Quercetin-Bromelain Complex address?

  • Healthy Aging & Longevity
  • Joint & Bone Health
  • Skin, Hair & Nail Health
  • Immune System Support
  • Respiratory Health

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

  • Douglas Laboratories Quercetin-Bromelain Complex has the highest total amount of Vitamin C: 200 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Douglas Laboratories Hydrolyzed Collagen+: 1 scoop
    • Douglas Laboratories Quercetin-Bromelain Complex: 1 tablet
  • Vitamin C
    • This supplement has 50 mg
    • Recommended Dietary Allowance in men: 90 mg
    • Recommended Dietary Allowance in women: 75 mg
    • Tolerable Upper Intake Level: 2000 mg
  • Zinc
    • This supplement has 1 mg
    • Recommended Dietary Allowance in men: 11 mg
    • Recommended Dietary Allowance in women: 8 mg
    • Tolerable Upper Intake Level: 40 mg
  • Copper
    • This supplement has 0.1 mg
    • Recommended Dietary Allowance in men: 0.9 mg
    • Recommended Dietary Allowance in women: 0.9 mg
    • Tolerable Upper Intake Level: 10 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 21, 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