I'm not sure, but I think the Prep phase and ULC portion of CBL is supposed to be very similar to CNS; however, looking at the CBL book's recommendations and the sample diets, they do not resemble the latest suggestions of the CNS diet such as 1:1 ratio, focus on animal fats, avoid veges, dairy, etc.  The CBL book is not that old, and I know Kiefer has said this is version1.0 and should change to reflect bleeding edge research, but have things changed that drastically in less than a year?