The television commercial claims, "Get home from one job, start my second job and I'm running on empty. So I turn to 5-Hour Energy."
5-Hour Energy's ads target busy parents and working adults, as well as young people on YouTube and Facebook.
And you see the small shot bottles at checkout counters all over. The company says people drink it more than seven million times a week.
5-Hour Energy claims you'll "feel it in minutes" and it "lasts for hours."
Consumer Reports wanted to know: Can 5-Hour Energy kick your afternoon slump?
Jamie Hirsh with Consumer Reports says, "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."
5-Hour Energy contains B vitamins and 1,870 milligrams of what it calls an "energy blend" - a long list of ingredients including caffeine.
Jamie adds, "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."
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."
(tv commercial) While the couple in the ad carry around a six-pack of 5-Hour Energy, the label cautions "do not exceed two bottles daily, consumed several hours apart.
And it goes for a hefty price of about three dollars a shot.
Jamie says, "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."
If you do want to try 5-Hour Energy, be aware it isn't for everyone. The label cautions that women who are pregnant or nursing shouldn't try it, or children under 12.