100% Pure L-Glutamine — Recovery Amino Acid Powder
Pure L-glutamine — Enhance recovery, reduce soreness and support gut health.
Hard training depletes glutamine faster than your body can replace it — this closes the gap
100% pure L-glutamine — the body’s most abundant amino acid
Supports muscle recovery, gut integrity + immune resilience
Neutral taste — stacks invisibly with any shake
Description
Getting sick every time training peaks? That’s not bad luck — it’s biology.
L-glutamine is the body’s most abundant amino acid and the one hardest hit by intense training. SPORT Rx 100% Pure L-Glutamine replenishes what heavy sessions deplete — supporting muscle recovery, protecting against breakdown, and maintaining the immune resilience that keeps you training consistently.
It’s also a key fuel for the cells of the gut lining — one of the most time-tested ingredients in the game, in its purest form, with a neutral taste that disappears into any shake.
Ingredients
Active ingredients per serving:
- 100% pure L-glutamine — 5g
- Nothing else.
Product Benefits
L-Glutamine
- Helps preserve lean muscle during intense training
- Supports faster recovery and reduced downtime
- Increases muscle cell volume
- Supports gut integrity and immune cells
Directions + Warnings
Mix ≈5g with cold liquid after your workout, ideally alongside a protein shake.
WARNINGS: This product is not intended to diagnose, treat, cure or prevent any disease. Not a sole source of nutrition — use alongside a balanced diet and training programme. Pregnant or nursing mothers, individuals under 18 and those with a known medical condition should consult a healthcare professional before use. Store in a cool, dry place. Keep out of reach of children.
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100% Pure L-Glutamine — Recovery Amino Acid Powder
100% Pure L-Glutamine — Single Ingredient
Muscle Recovery & Performance Support
Recovery is where progress happens — and l-glutamine is one of the most trusted ingredients in sports nutrition for supporting it. As the most abundant amino acid in muscle tissue, glutamine plays an important role in muscle repair, recovery, immune resilience and performance during periods of intense training stress. 100% Pure L-Glutamine delivers this versatile amino acid in its simplest form: a single-ingredient, pharmaceutical-grade powder with no unnecessary fillers or additives.
Easy to stack with any recovery routine or training protocol, it gives athletes complete flexibility and control over their supplementation.
Shop Full Range
Protein Rx — All-In-One Protein Shake
Anti-Catabolic Protection
During intense or prolonged exercise, muscle tissue can break down for energy — a process known as catabolism — particularly when glycogen stores are low or calorie intake is insufficient.
L-glutamine helps protect against this by providing an alternative energy source for the body during training and by supporting the biochemical conditions within muscle cells that favour maintenance rather than breakdown. This anti-catabolic effect is particularly valuable during calorie restriction or high-volume training phases.
Immune Support for Hard-Training Athletes
Intense training temporarily suppresses immune function — a phenomenon well documented in the sports science literature. The primary driver of this effect is the depletion of glutamine, which immune cells use as their primary fuel source. Supplementing with l-glutamine during hard training periods helps maintain immune cell function and supports the immune resilience that allows athletes to train consistently without succumbing to training-induced illness.
Muscle Cell Volume and Recovery Support
L-glutamine contributes to muscle cell volumisation — supporting the hydration and swelling of muscle cells that is associated with improved recovery conditions and anabolic signalling. Well-hydrated, volumised muscle cells recover more effectively and create a more favourable environment for muscle protein synthesis following training. This makes l-glutamine not just an anti-catabolic tool but also a positive contributor to the recovery process.
Tasteless and odourless, mixing seamlessly into any supplement or drink.
FAQs
Please read our FAQs page to find out more.
What is l-glutamine?
L-glutamine is an amino acid naturally found in the body and muscle tissue. It plays an important role in muscle recovery, immune support and gut health — especially during periods of intense training or physical stress.
What are the benefits of 100% Pure L-Glutamine?
This formula is designed to support muscle recovery, reduce post-training soreness, assist lean muscle maintenance, support immune function and help maintain gut health.
Who should use this product?
It’s ideal for athletes, gym-goers, endurance trainers and active individuals looking to improve recovery and training consistency.
When should I take l-glutamine?
The best time to take it is immediately after training. During demanding training periods, an additional serving before bed may help further support recovery.
How do I use it?
Mix one rounded teaspoon (approximately 5 g) with cold water, juice or your post-workout shake.
Can I stack it with other supplements?
Yes. L-glutamine has a neutral taste and mixes easily with protein powders, creatine, BCAAs and other recovery supplements.
Does l-glutamine help with muscle soreness?
It may help support recovery from intense exercise and reduce the impact of training-related muscle breakdown and fatigue.
Can l-glutamine support lean muscle goals?
Yes. By supporting muscle recovery and reducing muscle breakdown, L-glutamine can help support lean muscle maintenance and performance goals.
Is this product flavoured?
No. SPORT Rx 100% Pure L-Glutamine is unflavoured and easy to mix into almost any beverage or supplement stack.
Does l-glutamine support immune health?
Yes. Intense exercise can place stress on the immune system, and glutamine is involved in supporting normal immune function during demanding training periods.
Can it help support gut health?
L-glutamine is commonly used to support the health and integrity of the gut lining, making it beneficial beyond just sports performance.
Is this product suitable for daily use?
Yes. It can be used daily as part of a balanced nutrition and training routine.
What other Sport Rx products should I use alongside it?
To support recovery and your strength and muscle building goals, we highly recommend that you supplement your diet with a high quality protein supplement like Protein Rx or Whey Rx, especially whilst supplementing with Creatine Rx, which is formulated to support increased training intensity and effort and thereby increase the body’s demand for high quality proteins needed to facilitate recovery and optimal muscle building.
Can I mix 100% Pure L-Glutamine with my protein shake?
Yes, you can mix l-glutamine with your protein shake or any other beverage of your choice. It's a convenient way to consume l-glutamine. Just make sure to stir or shake the mixture well to ensure the powder dissolves completely.
Can beginners use this supplement?
Absolutely. Whether you’re new to training or an experienced athlete, L-glutamine is a simple and effective addition to a recovery-focused supplement routine.