Synopsis

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

L-glutamine is an amino acid that has been studied for its potential role in supporting endurance and recovery in athletes and individuals experiencing physical fatigue. The rationale for its use is based on the observation that glutamine levels can decrease after prolonged, intense exercise, which may impact immune function and muscle recovery. Some researchers have hypothesized that glutamine supplementation could help restore these levels, reduce muscle soreness, and support endurance capacity.

However, the scientific evidence supporting the use of L-glutamine specifically for improving endurance is limited and inconsistent. Several studies have found that glutamine supplementation does not significantly enhance endurance performance, reduce perceived fatigue, or improve time to exhaustion in healthy athletes. Systematic reviews and meta-analyses generally conclude that while glutamine may help maintain immune function after strenuous exercise, it does not provide a clear benefit in terms of increasing endurance or exercise performance metrics.

In summary, while there is a theoretical basis and some preliminary research suggesting glutamine could play a role in recovery, the overall scientific evidence supporting its use for improving endurance performance is weak. Its primary benefit may relate more to immune support than to direct enhancement of endurance. As such, glutamine supplementation is not widely recommended as a performance enhancer for endurance athletes based on current evidence.

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Other ingredients used for Endurance (lack of)

Other health conditions supported by l-glutamine

Products containing l-glutamine

Douglas Laboratories 5-HTP Plus Formula
Designs For Health Amino-D-Tox™
Designs For Health Amino-D-Tox™
Pure Encapsulations Amino-NR
Pure Encapsulations Amino Replete
Designs For Health BCAA Powder with L-Glutamine
Metagenics Clear Change 10-Day Detox Program with UltraClear Plus Berry
Metagenics Clear Change 10-Day Detox Program with UltraClear Plus pH
Metagenics Clear Change 10-Day Detox Program with UltraClear Plus pH Pineapple Banana
Metagenics Clear Change 10-Day Detox Program with UltraClear Plus Pineapple Banana
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
Integrative Therapeutics Detoxication Factors
Integrative Therapeutics Detoxication Factors
Thorne EnteroMend NSF
Pure Encapsulations EpiIntegrity
Pure Encapsulations G.I. Fortify
Pure Encapsulations G.I. Fortify
Pure Encapsulations G.I. Integrity
Pure Encapsulations G.I. Integrity
Designs For Health GI Revive®
Designs For Health GI Revive®
Metagenics GI Sustain™ Powder
Metagenics Glutagenics® powder
Integrative Therapeutics Glutamine Forte Drink Mix
Vitabase HGH Complex
Designs For Health IBSynergy™
Klean Athlete Klean Essential Aminos + HMB®
Klean Athlete Klean Isolate ™
Thorne L-Glutamine
Pure Encapsulations l-Glutamine
Designs For Health L-Glutamine
Douglas Laboratories L-Glutamine
Pure Encapsulations l-Glutamine 500 mg
Pure Encapsulations l-Glutamine 850 mg
Pure Encapsulations l-Glutamine 850 mg
Designs For Health L-Glutamine Powder
Designs For Health L-Glutamine Powder
Douglas Laboratories L-Glutamine Powder
Thorne L-Glutamine Powder NSF
Pure Encapsulations Liver G.I. Detox
Thorne MediClear Plus
Integrative Therapeutics Multiplex-1 No-Iron
Douglas Laboratories Muscle Protect™ with HMB®
Designs For Health Neurolink™
Integrative Therapeutics Nutrivitamin No-Iron
Pure Encapsulations PureBi•Ome™ G.I.
Metagenics Ultra Potent-C 1000
Metagenics Ultra Potent-C Chewable
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