There's a new warning out about those energy drinks that seem to be on store shelves everywhere these days.
Researchers at Johns Hopkins University say some of then have potentially harmful levels of caffeine. In fact some of them have the same caffeine amounts found in 14 cans of coke.
The average 12 ounce cola has 35 milligrams of caffeine. A six ounce coffee contains 80 to 150 milligrams while energy drinks which vary in size can have between 50 and 500 milligrams.
“At the higher level, caffeine is a drug. It's a stimulant. It's an alerting agent. But it can also induce sweating and hypertension and rapid heart rate,” said Dr. Steven Lamm an Internist at New York University.
And in rare cases they can even cause death.
The sale of energy drinks is booming in the United States. In fact, they take in over 5 billion dollars annually and because they are marketed as supplements, the drink makers don't have to reveal how much caffeine is in each can.
Experts are calling for better labeling that also warns of the potential risks.
The beverage industry insists and doctors agree, in moderation, the energy drinks can be safe.
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