EVIDENCE-BASED SUPPLEMENT SCORING
6.2/10
AVERAGE

Confidence: 100%

NOW Foods Sports Nutrition, L-Glutamine Pure Powder, Nitrogen Transporter*, Amino Acid, 1-Pound

NOW Foods Sports Nutrition, L-Glutamine Pure Powder, Nitrogen Transporter*, Amino Acid, 1-Pound

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Decision summary

CONSIDERAVERAGE

A middling option. It may be usable, but weaker ingredient form quality makes better alternatives worth comparing.

Best for

Buyers comparing price and availability and okay with a middle-of-the-pack option.

Consider another option if

You care a lot about label clarity and want fewer unknowns.

Score breakdown

Tap a module to see what it measures. A 0 can reflect missing disclosure, not just a negative result.

Dosage quality

4.0/10

Dosing looks weaker than ideal

Checks whether labeled ingredient amounts fall within clinically studied ranges (not just regulatory minimums). Low/0 can reflect under-dosing or missing amounts (e.g., proprietary blends).

Score summary

The formula stays relatively clean on excipients. The main limitation is that product name or brand not detected (-1).

Strengths

The formula stays relatively clean on excipients
The formulation has a clearer overall purpose
Label transparency is better than average

Weaknesses

Product name or brand not detected (-1)

Final verdict

A middling option. It may be usable, but weaker ingredient form quality makes better alternatives worth comparing.

Ingredient Analysis & Evidence

A closer look at the main ingredients, how they influence the score, and the supporting evidence when available. Tap any ingredient to expand.

ℹ At the minimum effective range, but below the optimal dose with moderate supporting evidence

Dose meets the minimum effective range, but is below the optimal dose used for stronger effects. One of the weaker points: Dose is below the ranges usually used for stronger effects. The declared form is not one of the better-absorbed options.

Scientific evidence

Meta-analysis

Coeffier et al. meta-analysis glutamine and intestinal permeability

Gut • 2010

PMID: 22423250.0

NOW Foods Sports Nutrition, L-Glutamine Pure Powder, Nitrogen Transporter*, Amino Acid, 1-Pound

NOW Foods Sports Nutrition, L-Glutamine Pure Powder, Nitrogen Transporter*, Amino Acid, 1-Pound

Warnings & notes

Important label or formulation details that may affect how this product should be interpreted.

There is a formulation caveat worth noting

Product name or brand not detected (-1)

Note

Methodology

Read our methodology overview to understand how SuppScoreLab combines multiple scientific dimensions into one practical score.

View methodology →

This evaluation is based on the product label and declared Supplement Facts available at review time. It does not verify laboratory-tested composition, purity, or batch-level quality. This content is educational and not medical advice. Consult a qualified healthcare professional for personal health decisions. Affiliate disclosure: SuppScoreLab may earn a commission from qualifying Amazon links.

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