Can an energy drink improve your memory? That's the promise of a growing number of products containing citicoline - which is also sold under the brand name "Cognizin." It's a molecule found naturally in the body, that's linked to speeding up the formation of brain cells, and boosting brain function. In some parts of the world, Cognizin is sold as a prescription drug to help stroke victims. But so far in North America, it's only sold in so-called "medical foods," which don't require FDA approval or a prescription from a doctor. For example: It's in a drink called Nawgan whose slogan reads: "What you drink when you want to think." It's also in gel packets called Go GungHo, whose packaging claims it'll give you "Ninja-like focus." Cognizin is also found in some popular energy drinks, like 5-Hour Energy. So, does it really work? Dr. Gary Small directs the Longevity Center at the University of California, and he says the good news is that many studies show that Cognizin is safe, and it has a "positive effect" on memory in stroke patients. However, he says the jury's still out on whether it does anything for rest of us. In fact, clinical trials show that Cognizin is no more effective at helping the average person improve their memory than a placebo. That's why Dr. Small urges caution in using any product that claims to give you a "dose of mental edge." He says if you really want to improve your memory, get regular exercise, and eat a diet rich in fruits and vegetables.