Klean Athlete Klean Collagen+C Unflavored
vs
Metagenics Glucosamine Sulfate 750
Supplement Comparison

  • Vitamin C: Metagenics Glucosamine Sulfate 750 has 20% 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 Klean Athlete Klean Collagen+C Unflavored vs Metagenics Glucosamine Sulfate 750.

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Frequently asked questions

Which active ingredients does Klean Athlete Klean Collagen+C Unflavored have?

  • Vitamin C appears as Mixed ascorbates from organic amla (Phyllanthus emblica)
  • Collagen Peptides appears as Hydrolyzed Collagen (from bovine)
  • Protein

Which active ingredients does Metagenics Glucosamine Sulfate 750 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 Collagen+C Unflavored and Metagenics Glucosamine Sulfate 750 belong to?

  • Collagen
  • Joint Formula

What health concerns do Klean Athlete Klean Collagen+C Unflavored and Metagenics Glucosamine Sulfate 750 address?

  • Athletic Performance
  • Healthy Aging & Longevity
  • Joint & Bone Health
  • Recovery & Repair
  • Skin, Hair & Nail Health

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

  • Metagenics Glucosamine Sulfate 750 has the highest total amount of Vitamin C: 60 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Klean Athlete Klean Collagen+C Unflavored: 1 scoop
    • Metagenics Glucosamine Sulfate 750: 2 tablets
  • 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
  • Vitamin C
    • This supplement has 60 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: 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