Dr. Allyn Byars (Angelo State University, San Angelo, TX), Dr. Susan Keith (Angelo State University) and their colleagues showed that a single serving of creatine-free EM•PACT sports drink significantly improved subjects’ maximal oxygen consumption (VO2max), time to exhaustion and percentage estimated non-protein fat substrate utilization [1]. Study was at least partially funded by Mannatech.


Byars A, Keith S, Simpson W, et al. (2010) The influence of a pre-exercise sports drink (PRX) on factors related to maximal aerobic performance. J Int Soc Sports Nutr 7:1-6.

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This article can also be accessed from PubMed.