Several energy drink makers often mislead consumers by mislabeling the amount of caffeine in their beverages, a new Consumer Reports study said.

Consumer Reports tested a total of sixteen energy products that did list amount of caffeine, and found that five of them, viz. Clif Shot Turbo Energy Gel, Arizona Energy, Nestle Jamba, Venom Energy, and Sambazon Organic, containing 20 per cent more caffeine than these products mentioned in the label.

Archer Farms Energy Drink was found containing 70 per cent less quantity of caffeine than what had mentioned in the label.

The report revealed the shocking findings as energy drinks are under fire following the death of a 14-year-old girl named Anais Fournier after she consumed an energy drink made by Monster Beverage Corp.

Anais Fournier's parents have sued Monster Beverage Corp. for the death of their daughter, claiming that the teen drank two Monster Energy Drinks within twenty-four hours and died from cardiac arrest due to high caffeine content in the drink.

Meanwhile, the Food & Drug Administration (FDA) is investigating five deaths as well as a non-fatal heart attack, which supposedly occurred after consuming Monster energy drinks.