Gu Energy Roctane Ultra Endurance Energy Drink Mix, Assorted Flavors, 10 Single Serve Travel Size Packets

This is great for those very long runs. The flavor is very good and it provides this needed calories without having to constantly eat. Easy to mix and dissolves well. It has the consistency of water and no grainy texture.

I have been training for a 1/2 marathon and consuming 1 of these at 45 minute intervals boosts my energy levels. Easy to transport, tasty on the tounge

I just spent 7 days riding 68 miles per day on average with a 100-mile century thrown in at RAGBRAI in Iowa and this stuff made a huge difference. On the days that I did nothing but Gu Energy Roctane Drink Mix (w/ caffeine in the morning and w/o in the afternoon), Gu gels, Gu stroopwafels, with plenty of water, and Gu Roctane Protein Recovery and Gu BCAA after. I felt fantastic. I crushed my PR for a century with a 21.5 mph average over 103 miles. On other days, I ate other food and felt awful at the end of the day. (I will add that I used PR Lotion. I feel that helped my performance, too.) There's no question that Gu's stuff helped me to hit my maximum performance. It provides a perfect blend of nutrients and electrolytes. And considering that it's a meal replacement, it's a no-brainer. I will be using this for all long rides in the future. If you look at this as meal replacement it's a check of a good deal.

Have used these on a few ultras and other long events. My proffered choice for any activity longer than 3-4 hours.

My favorite drink powder, packets are great for travel or carrying in long rides.