Clif Blueberry Crisp Energy Bar is crafted to provide sustained energy during athletic performance.  Carbohydrates from fast digesting sources, like sugar, are included to provide the moving athlete energy quickly.  We also include carbohydrates from more slowly digested sources like oats to provide more sustained energy. CLIF Bars also contain fat, protein and fibre which all help slow the release of energy a little bit but not too much.  The CLIF Bar recipe results in this food having a medium glycemic index.  They also contain Vitamins B6 and B12 which contribute to the normal release of energy for use in the body.  CLIF Bar is the leading energy bar in the United States and Canada, made with wholesome delicious ingredients that deliver energy.  CLIF Bar uses whole ingredients you can see and taste such as organic rolled oats and organic dates.