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Cited by 171Muscle metabolism and nutritionExercise and Physiological ResponsesClinical Nutrition and Gastroenterology

The DOI matches its Crossref record; 57 of the 57 references it cites were found in a registry or an index.

Dosing and Efficacy of Glutamine Supplementation in Human Exercise and Sport Training

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Gleeson, Michael·2008·The Journal of Nutrition
DOI 10.1093/jn/138.10.2045s
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Abstract

Some athletes can have high intakes of l-glutamine because of their high energy and protein intakes and also because they consume protein supplements, protein hydrolysates, and free amino acids. Prolonged exercise and periods of heavy training are associated with a decrease in the plasma glutamine concentration and this has been suggested to be a potential cause of the exercise-induced immune impairment and increased susceptibility to infection in athletes. However, several recent glutamine feeding intervention studies indicate that although the plasma glutamine concentration can be kept constant during and after prolonged strenuous exercise, the glutamine supplementation does not prevent the postexercise changes in several aspects of immune function. Although glutamine is essential for lymphocyte proliferation, the plasma glutamine concentration does not fall sufficiently low after exercise to compromise the rate of proliferation. Acute intakes of glutamine of approximately 20-30 g seem to be without ill effect in healthy adult humans and no harm was reported in 1 study in which athletes consumed 28 g glutamine every day for 14 d. Doses of up to 0.65 g/kg body mass of glutamine (in solution or as a suspension) have been reported to be tolerated by patients and did not result in abnormal plasma ammonia levels. However, the suggested reasons for taking glutamine supplements (support for immune system, increased glycogen synthesis, anticatabolic effect) have received little support from well-controlled scientific studies in healthy, well-nourished humans.

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Metadata

Authors
Gleeson, M.
Affiliations
Loughborough University (GB)
Corresponding author
Gleeson, Michael
ORCID
Gleeson, Michael
Venue
The Journal of Nutrition
Publisher
Elsevier BV
Published
2008-10
Volume
138
Issue
10
Pages
2045S-2049S
ISSN
0022-3166 (ISSN-L)
DOI
10.1093/jn/138.10.2045s
OpenAlex
W2168025434
Cited by
171
References
54
Citations by year
2026: 8 · 2025: 7 · 2024: 11 · 2023: 5 · 2022: 3 · 2021: 13 · 2020: 14 · 2019: 8 · 2018: 11 · 2017: 8 · 2016: 8 · 2015: 13 · 2014: 13 · 2013: 9 · 2012: 12
FWCI
4.05
Type
journal article
Language
en
Open access
Licence
Locations
  • Journal of Nutrition (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Muscle metabolism and nutrition
  • Health Sciences › Medicine › Physiology (medical) › Exercise and Physiological Responses
  • Health Sciences › Nursing › Nutrition and Dietetics › Clinical Nutrition and Gastroenterology
Keywords
glutamine supplementation, physical activity, athletes, immune function, plasma glutamine, lymphocyte proliferation, dosage, tolerability, glycogen synthesis, blood ammonia
MeSH terms
Acid-Base Equilibrium, Communicable Disease Control, Dietary Proteins, Energy Metabolism, Fatigue, Glutamine, Humans, Immune System, Metabolism, Sports, Exercise, Muscle, Skeletal, Dietary Supplements

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