Journal
CRITICAL REVIEWS IN FOOD SCIENCE AND NUTRITION
Volume 61, Issue 7, Pages 1225-1239Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10408398.2020.1756216
Keywords
Athletic performance; dietary supplements; glutamine; leucine; whey protein
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Protein and amino acid supplementation play a significant role in exercise, with protein supplements potentiating muscle protein synthesis, lean mass, and exercise recovery. However, the effects of amino acid supplementation, including branched-chain amino acids, glutamine, or leucine, are inconclusive and lack sufficient evidence to support their use.
Dietary supplements, especially protein, are used by athletes to achieve the exercise and training daily demands, and have been receiving research focus on their role regarding recovery and performance. Protein supplements are preferred over traditional protein sources because of their ease of availability and use. In addition to consuming a complete protein supplement, such as whey protein, the ingestion of a supplement containing only amino acids has been of interest for promoting skeletal muscle anabolism and high-quality weight loss. The aim of this study was to review the existing evidence on the effects of protein and amino acid supplementation on exercise. The preponderance of evidence suggests that protein supplementation, especially milk proteins, potentiate muscle protein synthesis, lean mass and exercise recovery. Unlike proteins, amino acids supplementation (branched-chain amino acids, glutamine or leucine) results from research are equivocal and are not warranted.
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