The caffeine, aspartame and sugar contents of selected energy drinks were evaluated using HPLC and UV spectrophotometric procedures. The results obtained from this study indicated that the average concentration of caffeine, aspartame, and sugar in the analyzed beverages ranged from 1.11 ppm – 237.95 ppm, 283.84 ppm – 956.82 ppm and 91.05 ppm – 1686.73 ppm, respectively. None of the analyzed beverage samples was found to violate the current legal limits set by the US FDA food and beverages regulations.