Ok, so there is certainly some serious science behind this that is probably over our heads, and it is his own drink mix that he is advocating here, but it certainly is an interesting watch. Allen Lim has been making his own drink mixes and food as the nutritionist to some of the biggest teams (Garmin, RadioShack) and stars and offered his own line of Skratch Labs hydration mix. The result of the test is that you shouldn’t try to drink your calories since Lim claims it will dehydrate you and you won’t get the calories anyways. Instead you should drink a hydrating drink (like Scratch Labs of course) and eat real food.
Update: After doing some digging, it appears that most of this science and research behind the drink mix (which you can read for yourself here and here) is thanks to Lim’s former business partner Stacy Sims, who co-founded Skratch Labs with Lim. Stacy has a PhD in Sports Nutrition and was performing research at Stanford when Lim, whose expertise is in exercise physiology, saw her research on hydration and thermo-regulation. The team joined forces and headed over to the Garmin training camp in 2008 to try and improve the team’s hydration. Stacy created what came to be known as Secret Drink Mix, and she and Allen went into business together, selling the mix under the Skratch name. She parted ways with Lim a couple of years ago and founded Osmo, which has continued her research as Osmo continues to evolve.