Red Bull, the popular energy drink may give you wings in more ways than one -- according to an Australian study, they might get you a harp as well and a new, fluffy home in the clouds. Researchers found that even one can of sugar-free Red Bull appears to make blood more "sticky," increasing the risk of blood clots.

"After one can it seemed to turn the young individual into one with more of the type of profile you would expect to see with someone with cardiovascular disease," said Scott Willoughby, of the Cardiovascular Research Centre at the Royal Adelaide Hospital and Adelaide University. "People who already have existing cardiovascular disease may want to talk to their physician before they drink Red Bull in future."

"The study does not show effects which would go beyond that of drinking a cup of coffee," says Red Bull spokeswoman Linda Rychter. "Therefore, the reported results were to be expected and lie within the normal physiological range." Some of students that participated in the study said they drink as many as eight cans of Red Bull a night when they want to stay awake to study; the cans already warn customers not to drink more than two a day.

Although the study was done with college students, I know that a lot of high school students -- and kids even younger -- drink Red Bull. It might be worthwhile to talk to them to make sure they don't drink too much.