>> ... my vision improved
I’m sure your initial experience included dropping lotsa evil carbs. Have you checked yourself for pre/diabetes?
I never really ate evil carbs in the sense you might think. I only ate whole foods, and relatively small amounts of bread/pasta. But I may have been pre-diabetic...
since I no longer eat any grains or sugars besides a tablespoon of honey in some tea at night, I haven’t had any noticeable periods of tiredeness at all. The Paleo/SCD diet seems to work for me. At age 50 I passed my vision test at the MVA without glasses lol