Effects of nutritional interventions on competitive performance and dose‒response relationships among esports players of different skill levels: a systematic review and three-level meta-analysis.

Journal of the International Society of Sports Nutrition·December 31, 2026·PMID 42028821

Why it matters

For clinicians advising competitive gamers or performance-focused patients, this review suggests some supplements may improve reaction speed and higher-order cognitive performance, but the evidence base is heterogeneous and mostly low to moderate certainty.