Twinlab Glutamine Fuel supplement bottle
Twinlab

Glutamine Fuel Review

What We Researched
2 active ingredients analyzed · 1 inactive ingredient decoded · 2 brand certifications checked · Last updated: Aug 2026
93
Product Score Excellent
75
Brand Score Fair

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
L-Glutamine 4500 g
Bioavailability Excellent

Absorption Rating

  • L-Glutamine Good
Other Ingredients Excellent

Fillers & Additives

  • Silica
Efficacy Very Good

Dosage Analysis

  • L-Glutamine 4500 g High

Supplement Facts

Ingredient Amount % Daily Value
Calories 20 {Calories}
L-Glutamine 4500 g

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Brand Trust Report
Twinlab

Founded 1968 · Boca Raton, Florida, USA · 65 products · twinlab.com

Certifications

2 certifications
Consumerlab Verified Source
NSF Certified Verified

Transparency

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

Violation History

1 incident
Lawsuit Securities fraud, making false and misleading statements, and overstating inventory.2001Source
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Frequently Asked Questions
Is Twinlab Glutamine Fuel a good supplement?

Twinlab Glutamine Fuel received a product quality score of 93/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 2 active ingredients with 22 servings per container. All 1 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Twinlab, holds a brand trust score of 75/100 with 2 verified certifications including Consumerlab, NSF Certified.

What are the ingredients in Twinlab Glutamine Fuel?

Twinlab Glutamine Fuel contains 2 active ingredients: Calories (20 {Calories}), L-Glutamine (4500 g). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Twinlab Glutamine Fuel safe to take?

Twinlab Glutamine Fuel has been analyzed for ingredient safety across all its components. All 1 inactive ingredients — including capsule materials, fillers, and binders — are rated safe based on regulatory data and published safety research. This is a clean formulation with no controversial additives. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Twinlab a trustworthy supplement brand?

Twinlab receives a brand trust score of 75/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1968 and headquartered in Boca Raton, Florida, USA, the company offers 65 products in their lineup. They hold 2 verified certifications including Consumerlab, NSF Certified. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Twinlab has 1 historical regulatory incident 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 — 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.