There's been several cases described of people that have gone into cardiac arrest after consuming more than one energy beverage, and when they've done sort of further analysis on these individuals, they haven't been able to find anything abnormal other than the very high levels of caffeine and taurine in the toxicology, in one case, a young 28-year-old who drunk eight cans of an energy drink actually went into cardiac arrest, and they found John Higgins arteries of John Higgins heart were completely locked up. When they were able to open them up, all the testing revealed nothing wrong with this person other than he had high levels of caffeine and taurine.