Will Red Bull Help or Destroy Your Sleep?

Yup, the culprit here again is caffeine, and it’s present in spades. An eight-ounce Red Bull energy drink contains about 80 milligrams of caffeine or equivalent to a one-ounce Starbucks espresso.

Five-Hour Energy packs 200 milligrams of caffeine into just two ounces, which means you might as well be imbibing 16 ounces of regular coffee.

With this much caffeine, you might do well to avoid energy drinks even earlier in the day. “In some people caffeine can take up to eight hours to wear off,” says Gans.