Supplements / Exploratory
L-Glutamine
Best for: Gut support
L-Glutamine is rated limited evidence (tier C on our evidence scale). 5 g daily; doses up to 30 g have been studied in clinical contexts. Morning, away from food.
Sources last reviewed
When and how to take L-Glutamine
- Dose
- 5 g daily; doses up to 30 g have been studied in clinical contexts.
- Timing
- Morning, away from food.
- Review
- Reassess after 4 to 8 weeks.
- Forms
- l-glutamine
What L-Glutamine is used for
- 'Leaky gut' marketing far outruns the evidence in healthy adults.
- Real signal in IBS-D specifically and in clinical hospital nutrition.
What to look for when buying L-Glutamine
- Preferred third-party verification: USP Verified, Third-party tested (COA).
- Common contamination risks: Mislabeling / identity.
Where to get it
We’re building a curated list of third-party-tested products for L-Glutamine. Each one will meet our quality bar (preferred certifications, contamination screens) and carry an explicit affiliate disclosure.
Your experience
If you’ve tried L-Glutamine, you can log how it went. This stays on your device — only you see it.
We frame these as personal experience, not medical claims. Self-reported subjective outcomes are influenced by placebo, regression to the mean, and parallel lifestyle changes. We’ll never present ratings as equivalent to RCT evidence.
Research sources for L-Glutamine
- L-glutamine and intestinal permeability: review (reviewed 2026-04-30)
Related supplements
Almavivo is for education only, not medical advice. Check with a doctor or pharmacist before starting a supplement, especially if you take prescription medicine, are pregnant or breastfeeding, or have a long-term health condition.