Energy drinks consumption was associated with about a 2.4-fold increase in dental erosion. This has been attributed to a low pH and the high sugar content of energy drinks. In addition, Pinto et al found that energy drink intake may lead to cervical dentin hypersensitivity by removing the smear layer of the teeth. When compared to regular energy drinks, sugar-free drinks contain a relatively low amount of caffeine. For example, regular Red Bull contains 111mg of caffeine while sugar-free Red Bull has only 80 mg of caffeine. On a weekly basis, you can take a maximum of 5 to 6 drinks of an 8-ounce bottle is considered safe. 0JYG.