Why GU2O when original GU is already great?
They’re two different products, designed to work in tandem. GU2O keeps you hydrated by replenishing the electrolytes your body sweats out during exercise. GU provides your body with energy to exercise and to maintain your effort during long workouts and events. The two products serve different, but equally important, functions. Most of our elite athletes carry both GU energy gels and GU2O with them during training and racing.
