Thorne L-Arginine Plus
vs
Douglas Laboratories Cysto Renew
Supplement Comparison

  • L-Arginine: Thorne L-Arginine Plus 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
    • 20 nutrients compared
Bar chart: per-serving label amounts and listed forms for Thorne L-Arginine Plus vs Douglas Laboratories Cysto Renew.

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Frequently asked questions

Which active ingredients does Thorne L-Arginine Plus have?

  • Vitamin C appears as Ascorbic Acid
  • Vitamin B9 (Folate) appears as L-5-Methyltetrahydrofolate
  • L-Arginine
  • R-Lipoic Acid appears as Sodium R-Lipoic Acid
  • Resveratrol appears as Trans-Resveratrol
  • Green Tea appears as Green Tea Phytosome

Which active ingredients does Douglas Laboratories Cysto Renew have?

  • Magnesium appears as Magnesium Amino Acid Chelate
  • L-Arginine
  • Quercetin appears as Quercetin Dihydrate
  • Bromelain
  • Chondroitin Sulfate
  • L-Citrulline
  • Blend appears as Cysto Renew Proprietary Blend (Rhodiola rosea Extract, Lemon Balm Extract, Aloe Vera inner leaf)

Which categories do Thorne L-Arginine Plus and Douglas Laboratories Cysto Renew belong to?

  • Amino Acid Formula
  • Herbal Extract

What health concerns do Thorne L-Arginine Plus and Douglas Laboratories Cysto Renew address?

  • Athletic Performance
  • Blood Pressure Support
  • Heart & Cardiovascular Health
  • Men's Health
  • Anti-Inflammatory Support
  • Kidney, Bladder, Urinary Health
  • General Health

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Thorne L-Arginine Plus: 3 capsules
    • Douglas Laboratories Cysto Renew: 4 capsules
  • Vitamin C
    • This supplement has 300 mg
    • Recommended Dietary Allowance in men: 90 mg
    • Recommended Dietary Allowance in women: 75 mg
    • Tolerable Upper Intake Level: 2000 mg
  • Vitamin B9 (Folate)
    • This supplement has 920 mcg DFE
    • Recommended Dietary Allowance in men: 400 mcg DFE
    • Recommended Dietary Allowance in women: 400 mcg DFE
    • Tolerable Upper Intake Level: 1000 mcg DFE

Last updated: February 11, 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