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Twinlab Glutamine Fuel supplement bottle
Twinlab

Glutamine Fuel Review

What We Researched
2 active ingredients analyzed · 1 inactive ingredient decoded · 2 brand certifications checked · Page generated: Sep 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 Source available Primary evidence
NSF Certified Supporting evidence unavailable

Transparency

4 claims
Third Party Testing Claim — Claimed Evidence available Evidence
In House Testing — Claimed Evidence available Evidence
Testing Lab Disclosure — True Brand claim; evidence unavailable

Violation History

1 incident
Lawsuit Securities fraud, making false and misleading statements, and overstating inventory.2001 Source available Primary source
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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.

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?

GoodSupp reviewed the inactive-ingredient data available for Twinlab Glutamine Fuel. All 1 inactive ingredients — including capsule materials, fillers, and binders — are currently classified as safe in GoodSupp's ingredient reference data. This label analysis cannot determine whether the product is safe for a particular person, and source labels may change. 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. 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.