L-Glutamine and Glycine
Both are conditionally essential under stress and support gut and immune function through complementary pathways.
L-Glutamine
The gut-lining repair amino acid and immune fuel.
Glycine
A calming amino acid for sleep, collagen, and metabolic health.
Great to combine
These two are frequently stacked together; they complement each other and are commonly taken at the same time.
How to take them
L-Glutamine
- Dose
- 5–15 g per day
- Timing
- With meals or post-workout for gut support; spread across the day
Glycine
- Dose
- 3 g before bed for sleep; up to 10 g/day for collagen support
- Timing
- 30–60 minutes before bed for sleep; with meals for collagen/metabolic goals
Frequently asked
Can you take L-Glutamine and Glycine together?
Yes, they are commonly taken together. Both are conditionally essential under stress and support gut and immune function through complementary pathways.
What's the best time to take L-Glutamine and Glycine?
Around the same time works well. L-Glutamine: With meals or post-workout for gut support; spread across the day. Glycine: 30–60 minutes before bed for sleep; with meals for collagen/metabolic goals.
How do L-Glutamine and Glycine interact?
Synergy: Work better together than alone. Both are conditionally essential under stress and support gut and immune function through complementary pathways.
Related pairings
L-Glutamine + Probiotics
Glutamine restores the gut lining while probiotics help balance the microbiome — a complementary gut-health stack.
Creatine + L-Glutamine
Common in post-workout recovery stacks; glutamine for gut integrity and creatine for muscle energy replenishment.
Glycine + Magnesium
A classic sleep stack: glycine lowers core body temperature while magnesium glycinate relaxes muscles and calms the nervous system.
Glycine + NAC
NAC provides cysteine while glycine provides another rate-limiting precursor; together they are more effective at raising glutathione than either alone (GlyNAC protocol).