http://www.spiz.net/ I mixed up 500 calories of SPIZ in one of my water bottles for my recent first 50 miler. I have been trying to find a non-sweet energy drink with some protein in it. My training leading up to the 50 miler began August 1 and my average training speed for the 6 weeks leading up to the ride was just over 13.5 mph with my longest ride at 41 miles. My 50 mile ride consisted of more hills than I was used to climbing and we had a head wind on the return 25 miles. I finished with an average time of 16.4 mph and felt nearly as fresh as I had before it started. I only stopped one time at an aid station at the 25 mile mark and then only had 2 orange slices and a cup of gatorade. I drank the Spiz about every 10 miles. I have used GU and other gels as well as gatorade, but this stuff seemed to have done alot more to keep me going. Just curious if anyone else has used it.