Kirkland Signature Adult Gummies C supplement bottle
Kirkland Signature

Adult Gummies C

What We Researched
2 active ingredients analyzed · 7 inactive ingredients decoded · 6 brand certifications checked · Last updated: Mar 2026
53
Product Score Poor
82
Brand Score Good

Product Analysis

Transparency Very Poor

Supplement Facts

IngredientAmount% DV
Ascorbic Acid
Sodium Ascorbate
Bioavailability Very Good

Absorption Rating

  • Ascorbic Acid Fair
  • Sodium Ascorbate Good
Other Ingredients Very Good

Fillers & Additives

  • Sugar
  • Corn Syrup
  • Water
  • Gelatin (Porcine)
  • Sodium Citrate
  • Natural Flavors
  • Color Added Medium
Efficacy N/A

Dosage Analysis

Dosage data not available for assessment.

Supplement Facts

Ingredient Amount % Daily Value
Ascorbic Acid
Sodium Ascorbate

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Sugar Generally_safe

Adds sweetness to chewable or gummy supplements.

Corn Syrup Generally_safe

Provides sweetness and texture in gummy supplements.

Water Safe

Dissolves and carries water-soluble ingredients.

Gelatin (Porcine) Unknown
Sodium Citrate Safe

Stabilizes pH and helps maintain ingredient effectiveness.

Natural Flavors Safe

Improves taste of chewable, gummy, or liquid supplements.

Color Added Caution

It is used to improve the appearance of the supplement.

Brand Trust Report
Kirkland Signature

Founded 1995 · Issaquah, Washington, United States · 26 products · costco.com/kirkland-signature.html

Certifications

6 certifications
Consumerlab Verified
Non Gmo Project Verified
Usda Organic Verified
Usp Verified Verified Source
Gluten Free Gfco Verified
Vegan Certified Verified

Transparency

4 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Claimed
In House Testing — Claimed

Violation History

3 incidents
Lawsuit Falsely advertising rotisserie chicken as containing 'no preservatives'2026Source
Recall Kirkland Signature B100 Complex Timed Release2025-03-31Source
Recall Kirkland Signature Severe Cold and Flu Plus Congestion2024-11-30Source
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Frequently Asked Questions
Is Kirkland Signature Adult Gummies C a good supplement?

Kirkland Signature Adult Gummies C received a product quality score of 53/100 in GoodSupp's independent analysis, indicating several areas of concern that consumers should review. The product contains 2 active ingredients Of the 7 inactive ingredients, 3 are rated safe and 1 are flagged for review. The manufacturer, Kirkland Signature, holds a brand trust score of 82/100 with 6 verified certifications including Consumerlab, Non Gmo Project, Usda Organic, Usp Verified.

What are the ingredients in Kirkland Signature Adult Gummies C?

Kirkland Signature Adult Gummies C contains 2 active ingredients: Ascorbic Acid, Sodium Ascorbate. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Kirkland Signature Adult Gummies C safe to take?

Kirkland Signature Adult Gummies C has been analyzed for ingredient safety across all its components. Of 7 inactive ingredients, 3 are rated safe. 1 ingredient is flagged for review: Color Added. 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Kirkland Signature a trustworthy supplement brand?

Kirkland Signature receives a brand trust score of 82/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1995 and headquartered in Issaquah, Washington, United States, the company offers 26 products in their lineup. They hold 6 verified certifications including Consumerlab, Non Gmo Project, Usda Organic, Usp Verified. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Kirkland Signature has 3 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.