The GU2O formula draws on 40 years of international scientific research as well as over 5 years of product development and field-testing by athletes. It's a clean tasting and refreshing Sports Drink that absorbs quickly and completely, complementing the performance benefits of GU Energy Gel. From the creator of GU Energy Gel Hydrate, perform and recover
Reviewed by bluetriI've used all the following Accelerade, Gatorade Endurance, Motortabs, GU2O, and others. I'd have to say GU2O is one of my favorites because of it's light flavor. It's easy on the palate when you don't want the strong sugary stuff deep into a ride or workout. The 2 flavors I've tried are Mango and Raspberry and I like both equally. The GU2O requires a little extra effort to mix but it's worth it.