A recent study comparing drinks with just caffeine versus drinks labeled as energy drinks was released. A high volume energy drink versus caffeine consumption study was released in the Journal of the American Heart Association. This study observed electrocardiogram and blood pressure effects from energy drinks versus just straight caffeinated drinks.
This was a double blind random controlled study. Eighteen young individuals that were healthy were picked. Those that participated consumed either thirty two ounces of caffeinated drink or energy drink.
Either drink included three hundred twenty miligrams of caffeine. These participants then went through a six day washout perioud. QT interval and systolic blood pressure were significantly higher in those that consumed energy drinks.