At the beginning stages of your activity, along with instant energy, you also need a sustained energy source to avoid spiking and dropping. RRUNN Pre is a blend of Dextrose, a simple, 100 GI carbohydrate and Isomaltulose, a complex, 32 GI carbohydrate. Dextrose breaks down quickly and is rapidly absorbed by the body to give you an instant burst of energy. Isomaltulose breaks down slowly to release gradual, prolonged energy that lasts for up to 120 minutes of your activity. There is an added caffeine kick, for extra mental focus and alertness. With RRUNN Pre, once you surge ahead, you stay on top without dropping. RRUNN Pre is vegan, gluten-free and can be pre-mixed before an event.