Red Bull Cola energy drink on a supermarket shelf on Friday

Download this stock image: Red Bull Cola energy drink on a supermarket shelf on Friday, January 9, 2009. The energy drinks, which were originally marketed to clubbers and extreme-sports enthusiasts, have entered the mainstream, appealing to health-minded consumers. The drinks are very high in caffeine and contain other ingredients deemed exotic such as taurine, glucosamine and ginseng. The health benefits of the ingredients has not been clinically proven. (Photo by Richard B. Levine) - 2F1DWPJ from Alamy's library of millions of high resolution stock photos, illustrations and vectors.

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Red Bull Cola energy drink on a supermarket shelf on Friday, January 9, 2009. The energy drinks, which were originally marketed to clubbers and extreme-sports enthusiasts, have entered the mainstream, appealing to