Kirkland Signature Fish oil supplement bottle
What We Researched
1 active ingredient analyzed · 4 inactive ingredients decoded · 6 brand certifications checked · Last updated: Mar 2026
66
Product Score Fair
82
Brand Score Good

Product Analysis

Transparency Very Poor

Supplement Facts

IngredientAmount% DV
Vitamin E (as mixed tocopherol)
Bioavailability Excellent

Absorption Rating

  • Vitamin E (as mixed tocopherol) Good
Other Ingredients Excellent

Fillers & Additives

  • Wild Alaskan Fish Oil (as naturally formed triglycerides)
  • Gelatin (Bovine)
  • Water
  • Glycerin
Efficacy N/A

Dosage Analysis

Dosage data not available for assessment.

Supplement Facts

Ingredient Amount % Daily Value
Vitamin E (as mixed tocopherol)

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Wild Alaskan Fish Oil (as naturally formed triglycerides) Unknown
Gelatin (Bovine) Safe

It is used to make capsules.

Water Safe

Dissolves and carries water-soluble ingredients.

Glycerin Safe

Retains moisture and helps dissolve ingredients in softgels and liquids.

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 Fish oil a good supplement?

Kirkland Signature Fish oil received a product quality score of 66/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 1 active ingredients Of the 4 inactive ingredients, 3 are rated safe and 0 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 Fish oil?

Kirkland Signature Fish oil contains 1 active ingredients: Vitamin E (as mixed tocopherol). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Kirkland Signature Fish oil safe to take?

Kirkland Signature Fish oil 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 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.