I am on Keto and fasting as well. For me Keto really helps with depression. There is a very good book called "Ketosis" the fourth fuel" that really goes into the facts and science on Ketosis (hint studies were only done in the 1990s because the military saw potential for its special forces) and there is serous evidence out there that it helps the brain in general by providing energy that you don't get when you are just using glucose.

I think I am probably going to be keto for life.