A: It certainly could be. Energy drinks come in a variety of formulations but most contain lots of caffeine and sugar - and possibly herbal stimulants and a supplementary amino acid known as taurine. However, it can be difficult to determine what's in them or how much.
Having an occasional energy drink isn't necessarily bad, especially those that contain about the same amount of caffeine as a cup or two of coffee and a similar amount of sugar as a can of soda. But many energy drinks contain much higher amounts of caffeine and other substances.
Alina Popa, M.D.
6-29-09
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