Kirkland Signature Coenzyme Q10 100 mg supplement bottle
Kirkland Signature

Coenzyme Q10 100 mg Review

What We Researched
1 active ingredient analyzed · 11 inactive ingredients decoded · 4 brand certifications checked · Last updated: Aug 2026
100
Product Score Excellent
80
Brand Score Good

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
CoEnzyme Q10 100 mg
Bioavailability Excellent

Absorption Rating

  • CoEnzyme Q10 Good
Other Ingredients Excellent

Fillers & Additives

  • Sodium Alginate
  • Bovine Gelatin
  • Carob
  • Ethylcellulose
  • Medium Chain Triglycerides
  • Oleic Acid
  • Flaxseed Oil
  • Glycerin
  • Stearic Acid
  • D-Alpha Tocopherol
  • Purified Water
Efficacy Excellent

Dosage Analysis

  • CoEnzyme Q10 100 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
CoEnzyme Q10 100 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Sodium Alginate Safe

It is used as a thickening agent and stabilizer.

Bovine Gelatin Safe

Forms capsule shells. Sourced from bovine (cow) collagen.

Carob Safe

It is used as a natural colorant or flavoring agent.

Ethylcellulose Generally_safe

It is used as a coating to control the release of supplement ingredients.

Medium Chain Triglycerides Safe

Enhances absorption of fat-soluble vitamins.

Oleic Acid Safe
Flaxseed Oil Safe

Carrier oil that also provides alpha-linolenic acid (ALA).

Glycerin Safe

Retains moisture and helps dissolve ingredients in softgels and liquids.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

D-Alpha Tocopherol Safe

Prevents oxidation and provides vitamin E.

Purified Water Safe

Dissolves and carries water-soluble ingredients.

Brand Trust Report
Kirkland Signature

Founded 1995 · Issaquah, Washington, United States · 56 products · costco.com/kirkland-signature.html

Certifications

4 certifications
Usp Verified Verified Source
Informed Choice Verified
USDA Organic Verified
Gluten-Free Certified Verified

Transparency

5 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Claimed
In House Testing — Claimed
Contains Proprietary Blend — True

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 Coenzyme Q10 100 mg a good supplement?

Kirkland Signature Coenzyme Q10 100 mg received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients with 300 servings per container. Of the 11 inactive ingredients, 10 are rated safe and 0 are flagged for review. The manufacturer, Kirkland Signature, holds a brand trust score of 80/100 with 4 verified certifications including Usp Verified, Informed Choice, USDA Organic, Gluten-Free Certified.

What are the ingredients in Kirkland Signature Coenzyme Q10 100 mg?

Kirkland Signature Coenzyme Q10 100 mg contains 1 active ingredients: CoEnzyme Q10 (100 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Kirkland Signature Coenzyme Q10 100 mg safe to take?

Kirkland Signature Coenzyme Q10 100 mg has been analyzed for ingredient safety across all its components. 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 80/100 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 56 products in their lineup. They hold 4 verified certifications including Usp Verified, Informed Choice, USDA Organic, Gluten-Free Certified. 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.

What is coq10?

Coq10 is a topic many supplement consumers ask about. In the context of dietary supplements, understanding coq10 helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 150,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

What is coq10 good for?

Coq10 Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding coq10 good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 150,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

How much coq10 should i take?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

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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 — read our methodology. 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.