Klean Athlete Klean Antioxidant
vs
Metagenics Glucosamine Sulfate
Supplement Comparison

  • Vitamin C: Klean Athlete Klean Antioxidant has 39% more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 14 nutrients compared
Bar chart: per-serving label amounts and listed forms for Klean Athlete Klean Antioxidant vs Metagenics Glucosamine Sulfate.

Frequently asked questions

Which active ingredients does Klean Athlete Klean Antioxidant have?

  • Vitamin C appears as Ascorbic Acid
  • Vitamin B7 (Biotin) appears as D-Biotin
  • Alpha Lipoic Acid
  • Astaxanthin appears as AstaReal Astaxanthin (supercritical CO2 extract of Haematococcus pluvialis)
  • Acetyl-L-Carnitine appears as Acetyl-L-Carnitine Chloride
  • Maqui Berry appears as Delphinol

Which active ingredients does Metagenics Glucosamine Sulfate have?

  • Vitamin C appears as Ascorbic Acid
  • Potassium appears as Potassium from D-Glucosamine Sulfate Potassium Chloride
  • Glucosamine Sulfate appears as D-Glucosamine Sulfate Potassium Chloride

Which categories do Klean Athlete Klean Antioxidant and Metagenics Glucosamine Sulfate belong to?

  • Antioxidant Complex
  • Sports Formula
  • Joint Formula

What health concerns do Klean Athlete Klean Antioxidant and Metagenics Glucosamine Sulfate address?

  • Antioxidant Support
  • Athletic Performance
  • Cellular Health
  • Recovery & Repair
  • Joint & Bone Health

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

  • Klean Athlete Klean Antioxidant has the highest total amount of Vitamin C: 125 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Klean Athlete Klean Antioxidant: 3 capsules
    • Metagenics Glucosamine Sulfate: 3 tablets
  • Vitamin C
    • This supplement has 125 mg
    • Recommended Dietary Allowance in men: 90 mg
    • Recommended Dietary Allowance in women: 75 mg
    • Tolerable Upper Intake Level: 2000 mg
  • Vitamin B7 (Biotin)
    • This supplement has 300 mcg
    • Adequate Intake in men: 30 mcg
    • Adequate Intake in women: 30 mcg
    • Tolerable Upper Intake Level: Not established
  • Vitamin C
    • This supplement has 90 mg
    • Recommended Dietary Allowance in men: 90 mg
    • Recommended Dietary Allowance in women: 75 mg
    • Tolerable Upper Intake Level: 2000 mg
  • Potassium
    • This supplement has 240 mg
    • Adequate Intake in men: 3400 mg
    • Adequate Intake in women: 2600 mg
    • Tolerable Upper Intake Level: Not established

Last updated: January 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).
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  • 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