These videos from TWiT.tv with Leo Laporte and Steve Gibson explaining how low-carb Paleo/primitive diets affect your biophysics; how ketosis is a good thing and can be achieved; how ketosis diets can affect weight loss, epilepsy, and Alzheimer’s; how you can smell it when it happens(!); and other related body hacks.
Excellent stuff, very well explained.
Part 1: Part 2:
Edit (20141126): Not sure if the links I originally gave are working anymore at all, but TWiT still has them for sure at the following links: