SupplementEmergingAmino Acid
L-Glutamine
Also known as L-Glutamine (Gut), glutamine, gut glutamine
Half-life
~30 minutes
What is L-Glutamine?
Conditionally essential amino acid—primary fuel for immune cells and gut epithelium. Depleted under stress/training.
How L-Glutamine works
Fuel for enterocytes (intestinal cells) and lymphocytes; maintains tight junctions and barrier function. Also pools in muscle and can be released for gluconeogenesis during fasting.
Benefits & uses
- Supports gut lining / barrier
- Recovery after intense training
- Immune support
Common uses: Immune support, gut lining integrity, recovery from intense training, mental clarity.
RecoveryMuscle
L-Glutamine dosage
- Typical dose
- 5–10 g daily
L-Glutamine half-life
~30 minutes (very short-lived)
L-Glutamine side effects
- Very short half-life requires frequent dosing
- Questionable absorption from powder (GI enzymes degrade it)
- Enteric-coated L-glutamine may be more effective
- Well tolerated
Commonly stacked with
Track L-Glutamine in Protokol.
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