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Best L-Glutamine products by transparent scoring (2026)
Single-ingredient products scored by public rules: dose fit, label transparency, data verification, company transparency, third-party testing. Not a measure of efficacy or safety. No paid placement.
Products ranked: 157 · Reference range: 500 – 9,000 mg (source) · Updated 2026-10-30
Dose fit 40 · Label transparency 20 · Data verification 15 · Company transparency 15 · Third-party test 10 — Methodology · L-Glutamine →
| Rank | Product | Per day | Score | Breakdown | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 tie |
L-Glutamine Twinlab · US NIH DSLD |
500 mg | 90.0 | Breakdown
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| 1 tie |
L-Glutamine XYMOGEN · US NIH DSLD |
4,000 mg | 90.0 | Breakdown
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| 1 tie |
L-Glutamine Nature's Sunshine · US NIH DSLD |
1,000 mg | 90.0 | Breakdown
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| 1 tie |
L-Glutamine 1000 MET-Rx · US NIH DSLD |
4,000 mg | 90.0 | Breakdown
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| 1 tie |
L-Glutamine 500 mg Spring Valley · US NIH DSLD |
4,000 mg | 90.0 | Breakdown
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| 1 tie |
L-Glutamine Powder MET-Rx · US NIH DSLD |
6,000 mg | 90.0 | Breakdown
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| 1 tie |
L-Glutamine Powder 4500 mg The Vitamin Shoppe · US NIH DSLD |
4,500 mg | 90.0 | Breakdown
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| 8 | L-Glutamine 500 mg Vitamin World · US NIH DSLD |
1,000 mg | 88.0 | Breakdown
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| 9 tie |
FOS + L-Glutamine Genestra Brands · US NIH DSLD |
4,500 mg | 85.0 | Breakdown
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| 9 tie |
L-Glutamine 1000 mg Solgar · US NIH DSLD |
4,000 mg | 85.0 | Breakdown
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| 9 tie |
L-Glutamine 500 mg Solgar · US NIH DSLD |
4,500 mg | 85.0 | Breakdown
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| 9 tie |
L-Glutamine 500 mg Puritan's Pride · US NIH DSLD |
4,000 mg | 85.0 | Breakdown
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| 9 tie |
L-Glutamine Powder Bluebonnet · US NIH DSLD |
5,000 mg | 85.0 | Breakdown
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| 9 tie |
L-Glutamine Powder Carlson · US NIH DSLD |
3,000 mg | 85.0 | Breakdown
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| 9 tie |
L-Glutamine Powder Jarrow Formulas · US NIH DSLD |
2,000 mg | 85.0 | Breakdown
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| 16 tie |
GLUTAMINE Empire Health Distribution Inc. · Health Canada LNHPD |
5,000 mg | 84.0 | Breakdown
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| 16 tie |
GLUTAPURE Empire Health Distribution Inc. · Health Canada LNHPD |
5,000 mg | 84.0 | Breakdown
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| 16 tie |
GNC L-Glutamine 1000 Tablet GNC · Malaysia NPRA |
1,000 mg | 84.0 | Breakdown
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| 16 tie |
Glutamine Powder Healthy Body Services Inc. · Health Canada LNHPD |
5,000 mg | 84.0 | Breakdown
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| 16 tie |
L-Glutamine Prairie Naturals Health Products Inc. · Health Canada LNHPD |
5,000 mg | 84.0 | Breakdown
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| 16 tie |
L-Glutamine Designs for Health · Health Canada LNHPD |
850 mg | 84.0 | Breakdown
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| 16 tie |
L-Glutamine Platinum Naturals Ltd. · Health Canada LNHPD |
5,000 mg | 84.0 | Breakdown
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| 16 tie |
L-Glutamine GFR Pharma Ltd. · Health Canada LNHPD |
5,000 mg | 84.0 | Breakdown
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| 16 tie |
L-Glutamine New Roots Herbal Inc. · Health Canada LNHPD |
500 mg | 84.0 | Breakdown
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| 16 tie |
L-Glutamine Powder Designs for Health · Health Canada LNHPD |
3,000 mg | 84.0 | Breakdown
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| 16 tie |
LABRADA CREALEAN Empire Health Distribution Inc. · Health Canada LNHPD |
5,000 mg | 84.0 | Breakdown
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| 16 tie |
NOW L-Glutamine 1000 mg NOW Health Group, Inc. · Health Canada LNHPD |
1,000 mg | 84.0 | Breakdown
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| 16 tie |
Now L-Glutamine Powder NOW Health Group, Inc. · Health Canada LNHPD |
3,000 mg | 84.0 | Breakdown
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| 16 tie |
Platinum Naturals L- Glutamine Platinum Naturals Ltd. · Health Canada LNHPD |
500 mg | 84.0 | Breakdown
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| 16 tie |
Prairie Naturals L-Glutamine Prairie Naturals Health Products Inc. · Health Canada LNHPD |
500 mg | 84.0 | Breakdown
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| 16 tie |
Prairie Naturals L-Glutamine Powder Prairie Naturals Health Products Inc. · Health Canada LNHPD |
5,000 mg | 84.0 | Breakdown
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| 32 tie |
L-Glutamine Carlson · US NIH DSLD |
3,000 mg | 83.0 | Breakdown
|
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| 32 tie |
L-Glutamine 1000 mg Country Life · US NIH DSLD |
1,000 mg | 83.0 | Breakdown
|
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| 32 tie |
L-Glutamine 500 mg Bluebonnet · US NIH DSLD |
500 mg | 83.0 | Breakdown
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| 32 tie |
L-Glutamine Caps 500 mg Country Life · US NIH DSLD |
500 mg | 83.0 | Breakdown
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| 36 tie |
L-Glutamine Jarrow Formulas Inc. · Health Canada LNHPD |
2,000 mg | 79.0 | Breakdown
|
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| 36 tie |
L-Glutamine Thorne Research, Inc. · Health Canada LNHPD |
500 mg | 79.0 | Breakdown
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| 36 tie |
L-Glutamine 1000 Jarrow Formulas Inc. · Health Canada LNHPD |
1,000 mg | 79.0 | Breakdown
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| 39 tie |
100% Pure L-Glutamine 5000 ANSI Pro-Series · US NIH DSLD |
5,000 mg | 75.0 | Breakdown
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| 39 tie |
GAKG NutraBio · US NIH DSLD |
6,000 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine Klaire Labs · US NIH DSLD |
500 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine NutriCology · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine SuperSmart · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine Momentous · US NIH DSLD |
5,000 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine Pure · US NIH DSLD |
970 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine AN Amazing Nutrition Amazing Formulas · US NIH DSLD |
1,000 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine BulkSupplements.com · US NIH DSLD |
5,000 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine Source Naturals · US NIH DSLD |
2,000 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine GNC Pro Performance · US NIH DSLD |
1,500 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine 1000 MRM · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine 1000 mg NusaPure · US NIH DSLD |
1,000 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine 1500 mg NOW Sports · US NIH DSLD |
6,000 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine 5 grams GNC Beyond Raw Chemistry Labs · US NIH DSLD |
5,000 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine 500 MRM · US NIH DSLD |
3,000 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine 500 mg Bronson · US NIH DSLD |
500 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine 500 mg AN Amazing Nutrition Amazing Formulas · US NIH DSLD |
1,500 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine 500 mg Amazing Muscle · US NIH DSLD |
1,500 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine 550 mg Lidtke · US NIH DSLD |
550 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine 800 mg Nutricost · US NIH DSLD |
2,400 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine Alpha-Ketoglutarate PureBulk.com · US NIH DSLD |
2,601 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine Powder Seeking Health · US NIH DSLD |
5,000 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine Unflavored Swolverine · US NIH DSLD |
5,000 mg | 75.0 | Breakdown
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| 39 tie |
L-Glutamine Unflavored Staunch Labs · US NIH DSLD |
5,000 mg | 75.0 | Breakdown
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| 39 tie |
Liposomal L-Glutamine+ Codeage · US NIH DSLD |
1,000 mg | 75.0 | Breakdown
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| 39 tie |
Micronized L-Glutamine Pure Advantage · US NIH DSLD |
5,000 mg | 75.0 | Breakdown
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| 39 tie |
Pure L-Glutamine Montiff · US NIH DSLD |
500 mg | 75.0 | Breakdown
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| 39 tie |
Pure L-Glutamine Powder Good 'N Natural · US NIH DSLD |
9,000 mg | 75.0 | Breakdown
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| 39 tie |
Theracurmin & L-Glutamine Natural Factors CurcuminRich · US NIH DSLD |
5,000 mg | 75.0 | Breakdown
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| 39 tie |
TruGlutamine PEScience · US NIH DSLD |
5,000 mg | 75.0 | Breakdown
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| 70 tie |
L-Glutamine GNC Mega Men · US NIH DSLD |
1,000 mg | 73.0 | Breakdown
|
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| 70 tie |
L-Glutamine Biotics Research Corporation · US NIH DSLD |
1,500 mg | 73.0 | Breakdown
|
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| 70 tie |
L-Glutamine 1000 mg NOW Sports · US NIH DSLD |
3,000 mg | 73.0 | Breakdown
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| 70 tie |
L-Glutamine 500 mg NOW · US NIH DSLD |
1,500 mg | 73.0 | Breakdown
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| 74 tie |
"L-Glutamine 1000 mg" capsule Absorb Science Inc. · Health Canada LNHPD |
1,000 mg | 69.0 | Breakdown
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| 74 tie |
Albi L-Glutamine 500 mg Capsules Bona Vita Holdings Inc. · Health Canada LNHPD |
500 mg | 69.0 | Breakdown
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| 74 tie |
BioX Glutamine Rush Nutrition Zone Products Inc. · Health Canada LNHPD |
5,000 mg | 69.0 | Breakdown
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| 74 tie |
CFN GLUTAFERM Caruso Fitness Nutrition, 3356001 Canada Inc. · Health Canada LNHPD |
5,000 mg | 69.0 | Breakdown
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| 74 tie |
GLUTAMINE (capsule) Pro Circuit High Tech Nutrition Inc. · Health Canada LNHPD |
1,000 mg | 69.0 | Breakdown
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| 74 tie |
Genestra Brands Amino L-Glutamine Seroyal International · Health Canada LNHPD |
500 mg | 69.0 | Breakdown
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| 74 tie |
Genuine L-Glutamine¿ Prestige Nutrition Inc. · Health Canada LNHPD |
5,000 mg | 69.0 | Breakdown
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| 74 tie |
Gluta -X Supplements K.D. Inc. · Health Canada LNHPD |
5,000 mg | 69.0 | Breakdown
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| 74 tie |
Glutabsorb Supplement Facts Inc. / Canada 3587843 Inc. · Health Canada LNHPD |
5,000 mg | 69.0 | Breakdown
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| 74 tie |
Glutamine Gaspari Nutrition Inc. · Health Canada LNHPD |
5,000 mg | 69.0 | Breakdown
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| 74 tie |
Glutamine TC Nutrition Inc. · Health Canada LNHPD |
5,000 mg | 69.0 | Breakdown
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| 74 tie |
Glutamine Holy Land Traditional Medications Inc. · Health Canada LNHPD |
900 mg | 69.0 | Breakdown
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| 74 tie |
Glutamine Pro Circuit High Tech Nutrition Inc. · Health Canada LNHPD |
800 mg | 69.0 | Breakdown
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| 74 tie |
Glutamine 300 Pro Supps USA, LLC · Health Canada LNHPD |
5,000 mg | 69.0 | Breakdown
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| 74 tie |
Glutamine Maxx Fit Foods LP · Health Canada LNHPD |
5,000 mg | 69.0 | Breakdown
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| 74 tie |
Glutamine Powder 9100-8292 Québec Inc. dba Advanced Performulations · Health Canada LNHPD |
5,000 mg | 69.0 | Breakdown
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| 74 tie |
L- Glutamine NutriMix Laboratories Inc. · Health Canada LNHPD |
5,000 mg | 69.0 | Breakdown
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| 74 tie |
L-Glutamine EHPlabs International, LLC · Health Canada LNHPD |
5,000 mg | 69.0 | Breakdown
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| 74 tie |
L-Glutamine Jacked Factory Inc. · Health Canada LNHPD |
1,000 mg | 69.0 | Breakdown
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| 74 tie |
L-Glutamine A.N. Tyler Holdings Ltd. · Health Canada LNHPD |
500 mg | 69.0 | Breakdown
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| 74 tie |
L-Glutamine TWC Nutrition Ltd. · Health Canada LNHPD |
5,000 mg | 69.0 | Breakdown
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| 74 tie |
L-Glutamine Sports Research · Health Canada LNHPD |
5,000 mg | 69.0 | Breakdown
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| 74 tie |
L-Glutamine Vitazan Herbs and Vitamins Inc · Health Canada LNHPD |
500 mg | 69.0 | Breakdown
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| 74 tie |
L-Glutamine Nutri-Care Canada Health · Health Canada LNHPD |
1,000 mg | 69.0 | Breakdown
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| 74 tie |
L-Glutamine Mass Global Inc. · Health Canada LNHPD |
5,000 mg | 69.0 | Breakdown
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| 74 tie |
L-Glutamine Canadian Sun Supplement City Ltd. · Health Canada LNHPD |
3,000 mg | 69.0 | Breakdown
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| 74 tie |
L-Glutamine Genex Nutraceuticals Inc. · Health Canada LNHPD |
5,000 mg | 69.0 | Breakdown
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For information only; not medical advice. Talk to a doctor or pharmacist before starting or stopping any supplement.