Nutrition for Sustained Energy_ With a mix of carbohydrates, protein, and fiber, CLIF BAR is a moderate glycemic index food. What does this mean? Basically, you'll benefit from a steady increase in blood sugar levels followed by a gradual decline (sustained energy!). Know what that means? You keep going. Eat a CLIF BAR 1 _ 2 hours before a workout or race, and you_ll avoid the sugar high and crash associated with refined ingredients and sweeteners. A CLIF BAR delivers the boost you need without unwanted crash and burn. You don_t have to be an athlete to enjoy a CLIF BAR, but with the extra energy a CLIF BAR provides you may find it hard not to be. Who knew energy could taste this good?