Metabolic Pathways while fasted and Ketosis

Was just commenting on Patri Friedman's livejournal (here) regarding how the metabolic channels used while fasting were the same as those used while on a low-carb diet.  Taubes notes fact in passing in Good Calories, Bad Calories but since that's a hard reference to check on the 'net, here's another bit of support from Dr. Mike Eades of Protein Power:

everything discussed as happening during starvation happens during carbohydrate restriction as well.

As noted before, this makes intuitive sense.  While in a fasted state, the body gets its energy fix by robbing the protein for gluconeogenesis from lean tissue and the fat for energy from adipose tissue.  While doing low-carb, the body does the same thing — the only difference is that it gets the fat and protein from dietary sources.

The rest of the Eades article discusses ketones/ketosis, which I'm still working on fully understanding (the basics, anyway).  Apparently there are other benefits to occasionally being in a ketogenic state that may include "de-junking" our cells.  Neat!