According to Dr. Laura Purdy, a board-certified family-medicine physician, energy drinks are generally considered to be safe. But it's ... of the other drinks, like Rockstar.

The British Soft Drinks Association said energy drinks had been "deemed safe" by regulators but that ... Relentless and Rockstar energy drink brands. Director general Gavin Partington added ...

And are energy drinks safe to drink? Presenter Greg Foot speaks ... However, Monster Original and Relentless Original contain 160mg. And Rockstar Original has a whopping 200mg of caffeine ...