California Gold Nutrition CollagenUP
vs
Klean Athlete Klean Collagen+C Tropical Fruit Flavor
Supplement Comparison

  • Vitamin C: California Gold Nutrition CollagenUP has 80% more
  • Collagen Peptides: Klean Athlete Klean Collagen+C Tropical Fruit Flavor has 2.8× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 7 nutrients compared
Bar chart: per-serving label amounts and listed forms for California Gold Nutrition CollagenUP vs Klean Athlete Klean Collagen+C Tropical Fruit Flavor.

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Frequently asked questions

Which active ingredients does California Gold Nutrition CollagenUP have?

  • Vitamin C appears as Calcium Ascorbate
  • Sodium
  • Collagen Peptides appears as Hydrolyzed Collagen Types 1 and 3
  • Hyaluronic Acid

Which active ingredients does Klean Athlete Klean Collagen+C Tropical Fruit Flavor have?

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

Which categories do California Gold Nutrition CollagenUP and Klean Athlete Klean Collagen+C Tropical Fruit Flavor belong to?

  • Collagen

What health concerns do California Gold Nutrition CollagenUP and Klean Athlete Klean Collagen+C Tropical Fruit Flavor address?

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

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

  • California Gold Nutrition CollagenUP has the highest total amount of Vitamin C: 90 mg per serving

Which product has a higher amount of Collagen Peptides per serving?

  • Klean Athlete Klean Collagen+C Tropical Fruit Flavor has the highest total amount of Collagen Peptides: 14 g per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • California Gold Nutrition CollagenUP: 1 scoop
    • Klean Athlete Klean Collagen+C Tropical Fruit Flavor: 1 scoop
  • 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
  • Sodium
    • This supplement has 20 mg
    • Adequate Intake in men: 1500 mg
    • Adequate Intake in women: 1500 mg
    • Tolerable Upper Intake Level: Not established
  • 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

Last updated: February 20, 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