I have been dealing with post concussion syndrome for a decade from sports injuries. When I fast it seems to make my brain much calmer and once I break the fast I have more sustained energy. I only fast when I know my schedule is lighter. I will go into fast and do a ketosis diet the next week and report how I feel. Right now I feel awful so I have nothing to lose.

Before Fast
Headache 7/10
Fatigue7/10
Body Aches 8/10
Focus 3/10