NOW Sports, L-Glutamine Powder supplement bottle

NOW

Sports, L-Glutamine Powder Review

Q: What are the ingredients in NOW Sports, L-Glutamine Powder?

NOW Sports, L-Glutamine Powder contains 2 active ingredients: Calories (20), L-Glutamine (Free-Form) (5,000 mg) (5 g). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Q: Is NOW a trustworthy supplement brand?

NOW receives a brand trust score of 100/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1968 and headquartered in Bloomingdale, Illinois, USA, the company offers 1759 products in their lineup. Note: NOW has 8 historical regulatory incidents on record, which are factored into the trust score.

What We Researched

2 active ingredients analyzed · 4 inactive ingredients decoded · 9 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
L-Glutamine (Free-Form) (5,000 mg)	5 g	†

Bioavailability Excellent

Absorption Rating

L-Glutamine (Free-Form) (5,000 mg) Good

Other Ingredients Excellent

Fillers & Additives

Hypromellose (Cellulose Capsule)
Hydroxypropyl Cellulose
Stearic Acid (Vegetable Source)
Magnesium Stearate (Vegetable Source) and Silicon Dioxide

Efficacy Excellent

Dosage Analysis

L-Glutamine (Free-Form) (5,000 mg) 5 g Effective

Supplement Facts

Ingredient	Amount	% Daily Value
Calories	20
L-Glutamine (Free-Form) (5,000 mg)	5 g	†

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Hypromellose (Cellulose Capsule) Safe

It is used as a material for making vegetarian capsules.

Hydroxypropyl Cellulose Safe

Binds tablet ingredients and can form tablet coatings.

Stearic Acid (Vegetable Source) Generally_safe

It is used as a lubricant and release agent.

Magnesium Stearate (Vegetable Source) and Silicon Dioxide Generally_safe

They are used to improve the flow and processing of the supplement.

Brand Trust Report

Certifications

9 certifications

Informed Sport Source available Primary evidence

Npa Gmp Source available Primary evidence

Consumerlab Source available Primary evidence

Labdoor Source available Primary evidence

Fda Gmp Inspections Source available Primary evidence

Non Gmo Project Source available Primary evidence

Usda Organic Source available Primary evidence

Vegan Certified Source available Primary evidence

Informed Choice Supporting evidence unavailable checked 2026-05-05

Transparency

5 claims

Coa Availability — Verified Evidence available Evidence

Third Party Testing Claim — Verified Evidence available Evidence

Testing Lab Disclosure — Claimed Brand claim; evidence unavailable

In House Testing — Verified Evidence available Evidence

Violation History

8 incidents

Lawsuit Mislabeled St. John's Wort supplement, containing significantly less of the active ingredient than advertised.None Source available Primary source

Lawsuit A data breach that compromised personal and health information of employees and dependents.2023 Source available Primary source

Prop 65 Lead2021-11-30 Source available Primary source

Recall NOW Real Food® Raw Macadamia Nuts2020-06-12 Source available Primary source

Recall NOW Real Food® Zesty Sprouting Mix2018-06-21 Source available Primary source

Lawsuit Misleadingly using slack-fill packaging for their Vitamin C supplements.2015 Source available Primary source

Fda Warning Adulterated Dietary Supplement due to pesticide (quintozene) contamination in American Ginseng.2007-10-12 Source available Primary source

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Frequently Asked Questions

Is NOW Sports, L-Glutamine Powder a good supplement?

NOW Sports, 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 2 active ingredients with 34 servings per container. All 4 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, NOW, holds a brand trust score of 100/100.

What are the ingredients in NOW Sports, L-Glutamine Powder?

NOW Sports, L-Glutamine Powder contains 2 active ingredients: Calories (20), L-Glutamine (Free-Form) (5,000 mg) (5 g). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is NOW Sports, L-Glutamine Powder safe to take?

GoodSupp reviewed the inactive-ingredient data available for NOW Sports, L-Glutamine Powder. All 4 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 NOW a trustworthy supplement brand?

NOW receives a brand trust score of 100/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1968 and headquartered in Bloomingdale, Illinois, USA, the company offers 1759 products in their lineup. Note: NOW has 8 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.