Energy drinks do not always divulge how much caffeine they contain, and when an amount is listed on a label, it is not always accurate, Consumer Reports magazine has found.
According to a study released on Thursday by the magazine, 11 of the 27 top-selling energy drinks in the U.S. do not specify the amount of caffeine in their beverages.
Of the 16 drinks that did list a specific caffeine amount, five had more caffeine per serving than was listed and the average amount over was more than 20 per cent.
The study comes on the heels of news that U.S. health regulators are investigating reports of five deaths that may be associated with Monster Beverage Corp's Monster Energy drink.
