Advertisements for the popular drink, 5-Hour Energy target busy parents and working adults, as well as young people on YouTube and Facebook.
The company says people drink 5-Hour Energy more than seven million times a week. The popular drink claims you'll "feel it in minutes" and it "lasts for hours."
Consumer Reports wanted to know if 5-Hour Energy could keep its promises.
"The company showed us a summary of a study it conducted that supports its claims of increasing attention and alertness. But the study hasn't been published, and the company wouldn't let us keep a copy," said Jamie Hirsh with Consumer Reports.
The pocket-sized drink contains B vitamins and 1,870 milligrams of what it calls an "energy blend" which contains a long list of ingredients including caffeine.
"While caffeine is a known stimulant, we found little if any published scientific research showing that the other ingredients in the 'energy blend' provide such a boost," Hirsh said.
As for the caffeine, the company won't disclose exactly how much but says it's comparable to a cup of "the leading premium coffee."
The label on 5-Hour Energy cautions "do not exceed two bottles daily, consumed several hours apart."
And it goes for a hefty price of about $3 per shot.
"The bottom line is 5-Hour Energy will probably chase away grogginess. But so will a cup of coffee, and it costs a lot less," said Hirsh.