Kirkland Signature Extra Strength Glucosamine 1500 mg Chondroitin 1200 mg supplement bottle
Kirkland Signature

Extra Strength Glucosamine 1500 mg Chondroitin 1200 mg

What We Researched
3 active ingredients analyzed · 13 inactive ingredients decoded · 6 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
89
Product Score Good
82
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Total Carbohydrates 3 g 1%
Glucosamine Hydrochloride 1.5 g
Chondroitin Sulfate Sodium (as Bovine, Porcine) 1.2 g
Bioavailability Good

Absorption Rating

  • Total Carbohydrates Fair
  • Glucosamine Hydrochloride Fair
  • Chondroitin Sulfate Sodium (as Bovine, Porcine) Good
Other Ingredients Excellent

Fillers & Additives

  • Glucosamine Hydrochloride
  • Chondroitin Sulfate Sodium
  • Croscarmellose Sodium
  • Microcrystalline Cellulose
  • Silicon Dioxide
  • Stearic Acid
  • Magnesium Stearate
  • Hydroxypropyl Methylcellulose
  • Sodium Lauryl Sulfate Low
  • artificial Vanilla flavor
  • Polyethylene Glycol Low
  • Carnauba Wax
  • May contain
Efficacy Excellent

Dosage Analysis

  • Glucosamine Hydrochloride 1.5 g Effective
  • Chondroitin Sulfate Sodium (as Bovine, Porcine) 1.2 g Effective

Supplement Facts

Ingredient Amount % Daily Value
Total Carbohydrates 3 g 1%
Glucosamine Hydrochloride 1.5 g
Chondroitin Sulfate Sodium (as Bovine, Porcine) 1.2 g

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Glucosamine Hydrochloride Unknown
Chondroitin Sulfate Sodium Unknown
Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Hydroxypropyl Methylcellulose Safe

It is used as a coating for tablets and capsules.

Sodium Lauryl Sulfate Caution

It is used to help mix oil and water-based ingredients.

artificial Vanilla flavor Unknown
Polyethylene Glycol Caution

It is used as a binder, coating agent, or to improve solubility.

Carnauba Wax Safe

Provides a glossy, protective coating on tablets.

May contain Unknown

Price Comparison

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

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 Extra Strength Glucosamine 1500 mg Chondroitin 1200 mg a good supplement?

Kirkland Signature Extra Strength Glucosamine 1500 mg Chondroitin 1200 mg received a product quality score of 89/100 in GoodSupp's independent analysis, indicating strong overall quality. The product contains 3 active ingredients with 110 servings per container. Of the 13 inactive ingredients, 7 are rated safe and 2 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 Extra Strength Glucosamine 1500 mg Chondroitin 1200 mg?

Kirkland Signature Extra Strength Glucosamine 1500 mg Chondroitin 1200 mg contains 3 active ingredients: Total Carbohydrates (3 g), Glucosamine Hydrochloride (1.5 g), Chondroitin Sulfate Sodium (as Bovine, Porcine) (1.2 g). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Kirkland Signature Extra Strength Glucosamine 1500 mg Chondroitin 1200 mg safe to take?

Kirkland Signature Extra Strength Glucosamine 1500 mg Chondroitin 1200 mg has been analyzed for ingredient safety across all its components. Of 13 inactive ingredients, 7 are rated safe. 2 ingredients are flagged for review: Sodium Lauryl Sulfate, Polyethylene Glycol. '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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This is an important question for supplement consumers. The dietary supplement industry is largely self-regulated, which means product quality, ingredient transparency, and safety practices vary significantly between brands and products. The most reliable way to evaluate any supplement is to check for third-party testing certifications, review the full ingredient list and dosages, and research the brand's regulatory track record. GoodSupp's database of over 250,000 analyzed products provides independent quality scores, ingredient safety ratings, and brand trust reports to help you make evidence-based decisions.

How to use turmeric?

This is an important question for supplement consumers. The dietary supplement industry is largely self-regulated, which means product quality, ingredient transparency, and safety practices vary significantly between brands and products. The most reliable way to evaluate any supplement is to check for third-party testing certifications, review the full ingredient list and dosages, and research the brand's regulatory track record. GoodSupp's database of over 250,000 analyzed products provides independent quality scores, ingredient safety ratings, and brand trust reports to help you make evidence-based decisions.

How to take turmeric for inflammation?

This is an important question for supplement consumers. The dietary supplement industry is largely self-regulated, which means product quality, ingredient transparency, and safety practices vary significantly between brands and products. The most reliable way to evaluate any supplement is to check for third-party testing certifications, review the full ingredient list and dosages, and research the brand's regulatory track record. GoodSupp's database of over 250,000 analyzed products provides independent quality scores, ingredient safety ratings, and brand trust reports to help you make evidence-based decisions.

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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.