IMO, this position takes good science and uses it incorrectly to move it's own agenda. While it is true that at least one study shows that whey is absorbed too quickly, this was not done in a postworkout environment which, in my opinion, is when whey is superior. Personally, throughout the day, I stick with a protein blend for my first shake and then 30g of hydrolyzed whey postworkout. I will post the synopsis of that stidy below for your peruval, the excerpt is from Planet Muscle, 2001.
THE BOIRE STUDY
...A well-designed study by Boire and Associates was perhaps the first step in changing the whole way bodybuilders should look at dairy proteins, both casein and whey. This study, which has become known as the "Boire study" infused labeled leucine into lactating cows then followed its path after it was separated into labeled casein or labeled whey protein and then fed to humans.
...The results of this study shook the nutrition industry down to its core. Even now, many supplement company owners are sitting on their excess mountain of ion-exchange whey failing to come to terms with the implications of the Boire study [Editors' Note: True, although a precious few protein manufacturers (such as Dr. Connelly-MET-Rx) were way ahead of the game].
In Praise Of Micellar Casein
...The key findings of the Boire study were:
With whey, the amino acids in the bloodstream dropped below normal two hours after ingestion.
Casein resulted in the best nitrogen retention and utilization. In fact, the amino acid levels remained elevated for up to seven hours.
Surprisingly, there was no change in protein breakdown with whey protein, despite very high initial amino acid levels.
Casein protein demonstrated strong anti-catabolism. Whey demonstrated none. [Editor's Note: This is very significant. Muscle growth in exercising mammals represents a shift of nitrogen dynamics to gradually overcome anti-catabolic response, moving into anabolic nitrogen retention. Researchers are aware that the prime reason anabolic steroids work, for example, is that they really are anti-catabolic and allow athletes to work out harder and longer.]
...Just when you thought that casein might be yesterday's news, reserved only for use when you run out of wallpaper paste, this study came along. This study showed immense absorption and growth potential with undenatured micellar casein.
...Probably the most important fact concerning the casein used in the Boire study was that it emptied from the stomach much more slowly than the whey. The fast emptying into the duodenum by whey resulted in a large influx of amino acids into the system overwhelming its capacity. [Editor's Note: Flatulence, bloating etc.] Additionally, unfortunately, it also resulted in around 40% of its aminos being oxidized by the liver for energy instead of being shuttled into muscle for growth and repair!
...But with casein, amino acid concentrations were lower initially, resulting in less oxidization and instead, powering up the inhibition of protein breakdown. Regular casein has always placed reasonably high on all known protein scoring systems, but its digestibility has always been misunderstood. Undenatured micellar casein's strength lies in its unique fractions.
Just to clarify, this is not saying that whey protein causes muscle loss, just that less of the whey is retained
