Amino Acid
L-Glutamine (Gut Repair)
Also known as: Glutamine, L-glutamine
Primary fuel for intestinal cells, essential for gut barrier repair and reducing intestinal permeability.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Every L-Glutamine (Gut Repair) product we have scored
| # | Product | Score | Per serving |
|---|---|---|---|
| 1 | Thorne EnteroMend® | 93 A | $1.40 |
| 2 | Thorne Creatine + BCAAs | 92 A | $1.73 |
| 3 | Thorne L-Glutamine Powder | 92 A | $0.49 |
| 4 | Pure Encapsulations L-Glutamine powder | 92 A | $0.75 |
| 5 | Momentous L-Glutamine | 92 A | $0.67 |
| 6 | NutraBio Glutamine | 92 A | $0.30 |
| 7 | Kaged Glutamine | 91 A | $0.25 |
| 8 | Transparent Labs Post Workout Supplement | 90 A | $1.67 |
| 9 | Jarrow Formulas Neuro Optimizer | 87 A | $1.67 |
| 10 | Thorne MediClear-SGS™ - Vanilla | 86 A- | $2.10 |
| 11 | Pure Encapsulations Epi-Integrity powder | 85 A- | $2.00 |
| 12 | Bluebonnet Nutrition L-GLUTAMINE POWDER | 85 A- | $0.85 |
Scored on dose accuracy, form, label transparency and third-party testing. Per-serving cost is list price divided by servings per container. No brand pays to be listed or ranked.
Common questions
How much L-Glutamine (Gut Repair) should I take?
The typical range is 5-20g daily for gut healing, 2-5g maintenance. High dose 2-3 months for healing, then maintenance
When should I take L-Glutamine (Gut Repair)?
Away from protein meals or divided throughout day. Either way.
Which form of L-Glutamine (Gut Repair) is best?
Powder — High doses easier. Other forms in the catalog: Capsules.
Is L-Glutamine (Gut Repair) safe?
Commonly reported: Rare at normal doses. Serious warnings: Liver disease - may worsen encephalopathy. Avoid with liver failure
Which L-Glutamine (Gut Repair) supplement scores highest?
Thorne EnteroMend®, at 93/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.
Daily target & upper limit
5 g / dayL-Glutamine (Gut Repair) has an established daily reference intake. See best forms, label synonyms, upper-limit warnings, and top-scoring supplements:
L-Glutamine (Gut Repair) dosage reference →Primary uses
- Gut barrier repair
- Leaky gut
- IBD support
- Enterocyte fuel
How it works
- Primary fuel for enterocytes
- Supports tight junction integrity
- Reduces intestinal permeability
- Aids mucosal healing
Dosage
- Typical range
- 5-20g daily for gut healing, 2-5g maintenance
- Timing
- Away from protein meals or divided throughout day
- With food
- Either way
- Duration
- High dose 2-3 months for healing, then maintenance
- Special populations
- Leaky gut, IBD, post-antibiotic, athletes
Forms
- Powder
- Capsules
Safety
Common side effects
- Rare at normal doses
Contraindications
- Hepatic encephalopathy
- Severe liver disease
Products containing L-Glutamine (Gut Repair)
Top-scoring supplements in our catalog that list L-Glutamine (Gut Repair) on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Strong evidence for gut barrier support
Grade A: Multiple well-designed human trials support the main claims.
Cited research for L-Glutamine (Gut Repair)
Clinical studies referenced across Formulate guides that mention l-glutamine (gut repair). Each links to the full study page with PubMed source + the guides that cite it.
Related in Amino Acid
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.