Synopsis

Source of validity: Scientific
Rating (out of 5): 2

L-glutamine is an amino acid that is sometimes used as a dietary supplement by athletes and individuals engaging in intense exercise. The rationale for its use is based on its role as a key fuel source for immune cells and its involvement in nitrogen transport, which is important for muscle recovery and protein synthesis. During prolonged or intense exercise, plasma glutamine levels may decrease, leading to the hypothesis that supplementation could help reduce muscle soreness, enhance recovery, or support immune function.

However, scientific evidence supporting these claims is limited and somewhat inconsistent. Some studies have indicated that L-glutamine supplementation may help reduce the incidence of exercise-induced infections, particularly in endurance athletes under heavy training loads. For example, a few small trials have shown a modest reduction in upper respiratory tract infections after supplementation. Regarding muscle recovery and performance, most research has failed to show significant benefits of glutamine supplementation for muscle soreness, recovery speed, or improvements in strength or endurance performance in healthy adults.

Overall, while there is scientific interest and some preliminary evidence suggesting a minor benefit for immune support in very specific athletic contexts, the overall evidence base is weak (rated 2/5), and glutamine is not widely recommended as an essential supplement for exercise recovery or performance in most populations.

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Other ingredients used for Exercise

Other health conditions supported by L-glutamine

Products containing L-glutamine

Douglas Laboratories 5-HTP Plus Formula
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Metagenics Clear Change 10-Day Detox Program with UltraClear Plus pH
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Metagenics Clear Change 10-Day Detox Program with UltraClear Plus Vanilla
Metagenics Clear Change 10-Day Detox Program with UltraClear RENEW Berry
Metagenics Clear Change 10-Day Detox Program with UltraClear RENEW Vanilla
Metagenics Clear Change 28-Day Detox Program with UltraClear Plus Berry
Metagenics Clear Change 28-Day Detox Program with UltraClear Plus pH Pineapple Banana
Metagenics Clear Change 28-Day Detox Program with UltraClear Plus pH Vanilla
Metagenics Clear Change 28-Day Detox Program with UltraClear Plus Pineapple Banana
Metagenics Clear Change 28-Day Detox Program with UltraClear Plus Vanilla
Metagenics Clear Change 28-Day Detox Program with UltraClear RENEW Berry
Metagenics Clear Change 28-Day Detox Program with UltraClear RENEW Chai
Metagenics Clear Change 28-Day Detox Program with UltraClear RENEW Vanilla
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Pure Encapsulations EpiIntegrity
Pure Encapsulations G.I. Fortify
Pure Encapsulations G.I. Fortify
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Pure Encapsulations G.I. Integrity
Designs For Health GI Revive®
Designs For Health GI Revive®
Metagenics GI Sustain™ Powder
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Integrative Therapeutics Glutamine Forte Drink Mix
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Pure Encapsulations l-Glutamine 850 mg
Designs For Health L-Glutamine Powder
Designs For Health L-Glutamine Powder
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Metagenics Ultra Potent-C 1000
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Metagenics UltraClear Plus® Detox Powder
Metagenics UltraClear Plus Detox Powder Berry
Metagenics UltraClear Plus Detox Powder Pineapple/Banana
Metagenics UltraClear Plus pH Detox Powder Pineapple/Banana
Metagenics UltraClear Plus pH Detox Powder Vanilla
Metagenics UltraClear RENEW Detox Powder Berry
Metagenics UltraClear RENEW Detox Powder Chai
Metagenics UltraClear RENEW Detox Powder Vanilla
Pure Encapsulations UltraDetox 10-Day Pure Pack
Metagenics UltraGI Replenish® Chocolate
Metagenics UltraGI Replenish Chocolate
Metagenics UltraGI Replenish Vanilla
Metagenics UltraGI Replenish Vanilla
Metagenics UltraInflamX Plus 360°® Chocolate/Orange
Metagenics UltraInflamX Plus 360° Mango
Metagenics UltraInflamX Plus 360° Mango
Metagenics UltraInflamX Plus 360° Orange
Metagenics UltraInflamX Plus 360° Original Spice
Metagenics UltraInflamX Plus 360° Pineapple/Banana
Metagenics UltraInflamX Plus 360° Pineapple/Banana