Thorne Vitamin C with Flavonoids
vs
Life Extension Vitamin C and Bio-Quercetin
Supplement Comparison

  • Vitamin C: Life Extension Vitamin C and Bio-Quercetin has 2.0× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 4 nutrients compared
Bar chart: per-serving label amounts and listed forms for Thorne Vitamin C with Flavonoids vs Life Extension Vitamin C and Bio-Quercetin.

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 Thorne Vitamin C with Flavonoids have?

  • Vitamin C appears as Ascorbic Acid
  • Citrus Bioflavonoids

Which active ingredients does Life Extension Vitamin C and Bio-Quercetin have?

  • Vitamin C appears as Ascorbic Acid
  • Quercetin appears as Bio-Quercetin Phytosome

Which categories do Thorne Vitamin C with Flavonoids and Life Extension Vitamin C and Bio-Quercetin belong to?

  • Antioxidant Complex
  • Single Vitamin

What health concerns do Thorne Vitamin C with Flavonoids and Life Extension Vitamin C and Bio-Quercetin address?

  • Antioxidant Support
  • Immune System Support
  • Liver & Detox Support
  • Recovery & Repair
  • Skin, Hair & Nail Health
  • Heart & Cardiovascular Health

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

  • Life Extension Vitamin C and Bio-Quercetin has the highest total amount of Vitamin C: 1000 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Thorne Vitamin C with Flavonoids: 1 capsule
    • Life Extension Vitamin C and Bio-Quercetin: 1 tablet
  • Vitamin C
    • This supplement has 500 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 1000 mg
    • Recommended Dietary Allowance in men: 90 mg
    • Recommended Dietary Allowance in women: 75 mg
    • Tolerable Upper Intake Level: 2000 mg

Last updated: February 9, 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