Natural Factors Micronized L-Glutamine Powder supplement bottle

Micronized L-Glutamine Powder Review

Q: What are the ingredients in Natural Factors Micronized L-Glutamine Powder?

Natural Factors Micronized L-Glutamine Powder contains 1 active ingredients: Micronized L-Glutamine (Pharmaceutical Grade) (5 g). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Q: Is Natural Factors a trustworthy supplement brand?

Natural Factors receives a brand trust score of 100/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1950 and headquartered in Coquitlam, British Columbia, Canada, the company offers 832 products in their lineup. Note: Natural Factors has 5 historical regulatory incidents on record, which are factored into the trust score.

What We Researched

1 active ingredient analyzed · 5 brand certifications checked · Page generated: Sep 2026

100

Product Score Excellent

100

Brand Score Excellent

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

Ingredient	Amount	% DV
Micronized L-Glutamine (Pharmaceutical Grade)	5 g	**

Bioavailability Excellent

Absorption Rating

Micronized L-Glutamine (Pharmaceutical Grade) Good

Other Ingredients Excellent

Fillers & Additives

No inactive ingredient data available.

Efficacy Excellent

Dosage Analysis

Micronized L-Glutamine (Pharmaceutical Grade) 5 g Effective

Supplement Facts

Ingredient	Amount	% Daily Value
Micronized L-Glutamine (Pharmaceutical Grade)	5 g	**

Brand Trust Report

Certifications

5 certifications

B Corp Certified Source available Primary evidence

Usp Verified Source available Primary evidence

Fda Gmp Inspections Source available Primary evidence

Non Gmo Project Source available Primary evidence

Usda Organic Source available Primary evidence

Transparency

4 claims

Third Party Testing Claim — Verified Evidence available Evidence

Testing Lab Disclosure — Verified Evidence available Evidence

In House Testing — Verified Evidence available Evidence

Violation History

5 incidents

Prop 65 Lead2025-10-31 Source available Primary source

Recall Hi Potency B Complex, RevitalX, Super Multi® IRON FREE2024-07-19 Source available Primary source

Lawsuit Products labeled as containing glucosamine sulfate did not contain the ingredient.2021 Source available Primary source

Prop 65 Lead2016-01-13 Source available Primary source

Recall Natural Factors L-Arginine 500mg2006-04-05 Source available Primary source

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Frequently Asked Questions

Is Natural Factors Micronized L-Glutamine Powder a good supplement?

Natural Factors Micronized L-Glutamine Powder received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients with 45 servings per container. The manufacturer, Natural Factors, holds a brand trust score of 100/100.

What are the ingredients in Natural Factors Micronized L-Glutamine Powder?

Natural Factors Micronized L-Glutamine Powder contains 1 active ingredients: Micronized L-Glutamine (Pharmaceutical Grade) (5 g). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Natural Factors Micronized L-Glutamine Powder safe to take?

GoodSupp reviewed the inactive-ingredient data available for Natural Factors Micronized L-Glutamine Powder. 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 Natural Factors a trustworthy supplement brand?

Natural Factors receives a brand trust score of 100/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1950 and headquartered in Coquitlam, British Columbia, Canada, the company offers 832 products in their lineup. Note: Natural Factors has 5 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 — 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.