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I've always been a proponent of whey isolate at bed time. The casein argument just doesn't seem to have merit. Yes, whey isolate goes through your system very quickly, and if I was awake and active, a fair enough point. But when you're in an essentially comatose state for eight hours, everything slows down, including your metabolism. This means that even a fast acting protein such as isolate would also be digested slower. Kiefer said as much in CBL. What I was curious about was whether there were any published studies that gave empirical evidence to support this thought. Anyone know of anything?
Kiefer does mention this in CBL. He says to consume whole food protein and if you want to consume a powder, consume casein. He says whey seems fine too, but it seems from reading between the lines that if cost and availability doesn't matter to consume casein.
Chapter 39, p. 145, he states that all proteins, whole food, milk, caesin, and whey (concentrate or isolate) 'all appear equivalent for 24 hour whole-body protein synthesis despite varying rates of absorption.' I agree. Just looking for something that has been published to corroborate this opinion.
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