GNC TriFlex Joint Support - 240 Caplets (80 Servings) supplement bottle
GNC

TriFlex Joint Support - 240 Caplets (80 Servings)

What We Researched
3 active ingredients analyzed · 8 inactive ingredients decoded · 5 brand certifications checked · 1 retailer compared · Last updated: Mar 2026
77
Product Score Fair
88
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Glucosamine Hydrochloride 1500 mg
Chrondroitin Sulfate, Sodium 1200 mg
MSM (Methylsulfonylmethane) 900 mg
Bioavailability Good

Absorption Rating

  • Glucosamine Hydrochloride Fair
  • Chrondroitin Sulfate, Sodium Fair
  • MSM (Methylsulfonylmethane) Good
Other Ingredients Excellent

Fillers & Additives

  • Cellulose
  • Stearic Acid Vegetable Source
  • Silicon Dioxide
  • Magnesium Stearate Vegetable Source
  • Triacetin
  • Croscarmellose Sodium
  • Oleic Acid
  • Polyethylene Glycol Low
Efficacy Fair

Dosage Analysis

  • Glucosamine Hydrochloride 1500 mg Effective
  • MSM (Methylsulfonylmethane) 900 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Glucosamine Hydrochloride 1500 mg
Chrondroitin Sulfate, Sodium 1200 mg
MSM (Methylsulfonylmethane) 900 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

Stearic Acid Vegetable Source Unknown
Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Magnesium Stearate Vegetable Source Unknown
Triacetin Generally_safe

It is used as a solvent or humectant.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Oleic Acid Safe
Polyethylene Glycol Caution

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

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$72$71$70$69$68 Mar 12 $69.99
GNC

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

Brand Trust Report
GNC

Founded 1935 · Pittsburgh, Pennsylvania, USA · 200 products · gnc.com

Certifications

5 certifications
Informed Sport Verified Source
Consumerlab Verified Source
Fda Gmp Inspections Verified Source
Usda Organic Verified Source
Vegan Certified Verified Source

Transparency

3 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Verified Source
In House Testing — Claimed
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Frequently Asked Questions
Is GNC TriFlex Joint Support - 240 Caplets (80 Servings) a good supplement?

GNC TriFlex Joint Support - 240 Caplets (80 Servings) received a product quality score of 77/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 3 active ingredients with 80 servings per container. Of the 8 inactive ingredients, 4 are rated safe and 1 are flagged for review. The manufacturer, GNC, holds a brand trust score of 88/100 with 5 verified certifications including Informed Sport, Consumerlab, Fda Gmp Inspections, Usda Organic.

What are the ingredients in GNC TriFlex Joint Support - 240 Caplets (80 Servings)?

GNC TriFlex Joint Support - 240 Caplets (80 Servings) contains 3 active ingredients: Glucosamine Hydrochloride (1500 mg), Chrondroitin Sulfate, Sodium (1200 mg), MSM (Methylsulfonylmethane) (900 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is GNC TriFlex Joint Support - 240 Caplets (80 Servings) safe to take?

GNC TriFlex Joint Support - 240 Caplets (80 Servings) has been analyzed for ingredient safety across all its components. Of 8 inactive ingredients, 4 are rated safe. 1 ingredient is flagged for review: 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 GNC a trustworthy supplement brand?

GNC receives a brand trust score of 88/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1935 and headquartered in Pittsburgh, Pennsylvania, USA, the company offers 200 products in their lineup. They hold 5 verified certifications including Informed Sport, Consumerlab, Fda Gmp Inspections, Usda Organic. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. No regulatory violations or FDA warning letters were found in our research.

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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.