The federal government and New York Attorney General's office are investigating after the Food and Drug Administration received claims that an energy drink - 5-Hour Energy - led to 13 deaths and 33 hospitalizations in the past four years.
The drink, which comes in 2oz shot form, has the same amount of caffeine as two cups of coffee.
This most recent FDA filing marks the second time in a moth that the administration has confirmed that it is investigating claims that energy drinks are causing fatal reactions. In October, Monster energy, which contains even more caffeine than 5-Hour Energy, was said to be linked with five deaths.
The manufacturers of both drinks, however, point out that these are just claims and note that there is no proven link between the drinks and the deaths. It is only when one drinks more than recommended that problems may crop up.