Ketones as a Fuel Source?

Ketones are more than just a fuel source, at least as far as the brain is concerned. They have interesting abilities to whether it's increased blood flow or boost growth factors like BDNF and inflamazome. Dr. Gundry talked about ketone being an inefficient fuel because it increases uncoupling in the mitochondria. And we're talking about leakage of energy that creates free radicals.