Caffeine is gaining notice as a difference-making ally in athletic performance. In addition to the sources we have cited in the past, including a blog post last month that cited articles in Men's Health and Men's Journal, there is yet another positive review we wanted to share.

It is contained in a June 30 piece at "Sports Are 80 Percent Mental," by Dan Peterson.

He quotes Dr. Rob James, the lead researcher on a recent study at Coventry University in the UK: "A very high dosage of caffeine, most likely achieved via tablets, powder or a concentrated liquid, is feasible and might prove attractive to a number of athletes wishing to improve their athletic performance."

"A small increase in performance via caffeine could mean the difference between a gold medal in the Olympics and an also-ran," Dr. James added.

XS Energy Drinks don't have sugar and they have hardly any carbs. But aside from the caffeine-free versions that we offer, our drinks do rely on caffeine, along with other great stuff like adaptogenic herbs and B vitamins, to give you, the citizens of XS Nation, the outstanding boost you've been counting on for the past eight years.

To learn more about the recently released study, click here for Dan Peterson's entire article, "More Proof That Caffeine Boosts Athletic Performance."