Last update
5/24/2025

Overview

SCIENTIFIC SCORE
Questionable
Based on 1 Research
5
USERS' SCORE
Good
Based on 11 Reviews
8.2
Supplement Facts
Serving Size:  2 Capsules
Serving Per Container: 120
Amount Per Serving
%DV
L-Glutamine
1 g
*

Top Medical Research Studies

5
Investigating L-glutamine in CFS
We explored how natural anti-inflammatory and antioxidant substances like L-glutamine could affect chronic fatigue syndrome (CFS) in patients. Over a 10-14 month period, we measured immune responses and overall health in 41 CFS patients before and after treatment.

Our findings indicated that improving gut health through these substances might lead to better clinical outcomes. While the study emphasizes targeted treatments for leaky gut in CFS, we found that it’s a promising area for future research rather than a definitive cure.
Read More

Most Useful Reviews

9
Enhanced recovery
2 people found this helpful
Glutamine has greatly improved my recovery after workouts and helped with chronic fatigue syndrome. I give my 5-year-old child 100 to 150 mg daily, and we both feel a positive effect. Combining it with Lysine intensifies its benefits.
Read More
9
Increased energy
1 people found this helpful
The product arrived in Brazil within 15 days, and it’s one of the best supplements available. It has significantly improved my energy levels and alleviated muscle fatigue, which helps with my chronic fatigue syndrome.
Read More
9
Consistent performance
Optimum Nutrition Glutamine is excellent for muscle recovery and managing chronic fatigue syndrome. It’s effective for reducing muscle fatigue, with easy-to-swallow capsules that provide a reliable supplement option.
Read More

Medical Researches

SCIENTIFIC SCORE
Questionable
Based on 1 Research
5
  • All Researches
5
Investigating L-glutamine in CFS
We explored how natural anti-inflammatory and antioxidant substances like L-glutamine could affect chronic fatigue syndrome (CFS) in patients. Over a 10-14 month period, we measured immune responses and overall health in 41 CFS patients before and after treatment.

Our findings indicated that improving gut health through these substances might lead to better clinical outcomes. While the study emphasizes targeted treatments for leaky gut in CFS, we found that it’s a promising area for future research rather than a definitive cure.
Read More

User Reviews

USERS' SCORE
Good
Based on 11 Reviews
8.2
  • All Reviews
  • Positive Reviews
  • Negative Reviews
9
Enhanced recovery
2 people found this helpful
Glutamine has greatly improved my recovery after workouts and helped with chronic fatigue syndrome. I give my 5-year-old child 100 to 150 mg daily, and we both feel a positive effect. Combining it with Lysine intensifies its benefits.
Read More
9
Increased energy
1 people found this helpful
The product arrived in Brazil within 15 days, and it’s one of the best supplements available. It has significantly improved my energy levels and alleviated muscle fatigue, which helps with my chronic fatigue syndrome.
Read More
9
Consistent performance
Optimum Nutrition Glutamine is excellent for muscle recovery and managing chronic fatigue syndrome. It’s effective for reducing muscle fatigue, with easy-to-swallow capsules that provide a reliable supplement option.
Read More
7.5
Cold prevention
This supplement improved my fatigue related to chronic fatigue syndrome, and I rarely catch a cold now. Despite the large capsules, I'm happy to continue using them.
Read More
9
Muscle repair support
Optimum Nutrition Glutamine supports muscle recovery, immune health, and gut health. It’s ideal for anyone, including those like me managing chronic fatigue syndrome, seeking to reduce muscle soreness after intensive workouts.
Read More

Frequently Asked Questions

7.5
Reduced fatigue
Taking glutamine has helped manage my chronic fatigue syndrome. I experience less fatigue the day after workouts when I dissolve the powder as directed, which prevents colds as well.
7.5
Helps recovery
I take it after training. Continuing with it helps me recover from fatigue, making it a very good product for managing my chronic fatigue syndrome.
9
Enhanced recovery
2 people found this helpful
Glutamine has greatly improved my recovery after workouts and helped with chronic fatigue syndrome. I give my 5-year-old child 100 to 150 mg daily, and we both feel a positive effect. Combining it with Lysine intensifies its benefits.
9
Increased energy
1 people found this helpful
The product arrived in Brazil within 15 days, and it’s one of the best supplements available. It has significantly improved my energy levels and alleviated muscle fatigue, which helps with my chronic fatigue syndrome.
7.5
Cold prevention
This supplement improved my fatigue related to chronic fatigue syndrome, and I rarely catch a cold now. Despite the large capsules, I'm happy to continue using them.
9
Muscle repair support
Optimum Nutrition Glutamine supports muscle recovery, immune health, and gut health. It’s ideal for anyone, including those like me managing chronic fatigue syndrome, seeking to reduce muscle soreness after intensive workouts.
5
Investigating L-glutamine in CFS
We explored how natural anti-inflammatory and antioxidant substances like L-glutamine could affect chronic fatigue syndrome (CFS) in patients. Over a 10-14 month period, we measured immune responses and overall health in 41 CFS patients before and after treatment.

Our findings indicated that improving gut health through these substances might lead to better clinical outcomes. While the study emphasizes targeted treatments for leaky gut in CFS, we found that it’s a promising area for future research rather than a definitive cure.

References

  1. Maes M, Leunis JC. Normalization of leaky gut in chronic fatigue syndrome (CFS) is accompanied by a clinical improvement: effects of age, duration of illness and the translocation of LPS from gram-negative bacteria. Neuro Endocrinol Lett. 2008;29:902.
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