Energy drinks have been consumed often in the field of sports to enhance power performance. However, the effects of energy drinks are inconsistent in previous studies. PURPOSE: To assess the effects of energy drinks on power performance using meta-analysis. METHODS: Published English language studies were located from computerized searches of following databases: Academic Search Complete, Education Source, ERIC, MEDLINE, PsycINFO, SPORTDiscus, and Google Scholar. Studies meeting inclusion criteria were: 1) included caffeine containing energy drinks, 2) reported a quantitative measure of power, 3) reported on supplement intervention, 4) published in peer reviewed journals and/or forms of thesis and dissertation from January 2000 to May 2016. Keywords included ‘energy drink or red bull or caffeine drink’ and ‘power or performance’. Two investigators independently collected data from the search engines and coded data for verification. The studies were coded for methodological, participant and study characteristics. The Comprehensive Meta-Analysis version-3 software was used to compute effect sizes (ES) and 95% confidence interval (CI) using a random effects model. ESs were computed based on a comparison of change scores between pre- and post- intervention. Subgroup analyses were conducted to identify moderators (gender, subject type, and dosage of caffeine). RESULTS: A total of 30 ESs were derived from the 10 selected studies for meta-analysis. The overall mean ES was small, but significant (Cohen’s d (ES) = 0.163, 95% CI = 0.04, 0.29). Subgroup analyses showed that ESs were not affected by any moderator variables. CONCLUSION: Results of the present analysis indicated that the consumption of energy drink slightly improves the power performance. Other moderating variables should be considered so that the effects of energy drink intake can be explored further.