If Your Pep Comes from a Bottle...
Drink a cup of water or seltzer before reaching for another caffeine-charged, guarana-ginko-ginseng-spiked energy drink. What feels like fatigue may actually be a side effect of fluid loss that’s so minor you might not feel thirsty, finds a study published in The Journal of Nutrition. When women were only slightly dehydrated—just 1 percent less than optimal—they felt tired, unfocused and blue. The irony: Caffeine’s diuretic properties can cause mild dehydration, and energy drinks have up to five times more of the stimulant than Coke does.