I don't see an article however, drinking energy drinks once a day shouldn't be bad for you. Energy Drinks stimulate the brain and some give electrolytes like "Gatorade" for example. Drinking these several times a week as long as it's not on the same day is fine.
Drinking energy drinks more than once a day can give you too much caffeine and over stimulate your brain. It will cause you to lose sleep, over stimulate your heart rate.
Drinking energy drinks is a better way to gain energy than coffee and other caffeine drinks.
