I don't know if you've read Brain Energy by Chris Palmer MD, but you'd probably really like it as a scientific confirmation of what you have experienced.
I used to be ketogenic, but ultimately moved to consuming more simple sugar from fruit juice etc per Ray Peat.
This is a belief that I held for years, leading me to avoid all of that stuff, yet increasing juice intake has been very helpful for feeling good and functioning well.
Note: Ray Peat is a crazy person who Twitter bro-science picked up, the kind of guys who were previously into keto and supplements that don't do anything.
They're similar in that they love saturated fat and red meat, and think vegetable oils are bad, but he also wants you to eat ice cream and sugar.
More-or-less, I guess. The methods work well for my feeling good and functioning well. e.g., no more migraines, reduced intensity of springtime allergies, more energy, better resistance to stress, etc.
I did use the bad word "confirmation", but I don't think it's harmful to look at scientific dialogue which aligns with what one experiences so as to understand that experience better, from new perspectives, find caveats, etc.
If we believe that our personal experiences can be an ingredient of real knowledge about the world, etc
I used to be ketogenic, but ultimately moved to consuming more simple sugar from fruit juice etc per Ray Peat.