[slodave]

Not sure if this study was ever proven elsewhere, but it made me stop drinking RB.

The caffeine-loaded beverage, popular with university students and adrenaline sport fans to give them "wings", caused the blood to become sticky, a pre-cursor to cardiovascular problems such as stroke.

"One hour after they drank Red Bull, (their blood systems) were no longer normal. They were abnormal like we would expect in a patient with cardiovascular disease," Scott Willoughby, lead researcher from the Cardiovascular Research Centre at the Royal Adelaide Hospital, told the Australian newspaper.

Red Bull drink lifts stroke risk: Australian study | Reuters