MCT oil. Three tablespoons a day that your liver can turn into enough ketones to make up for a 10% loss of brain function.
https://www.youtube.com/watch?v=XxGiQ7YrUYE
Start slow, as it will give you diarrhea if you aren’t used to it.
Costco has it, two 20oz bottles for about $22. Or Amazon, if you can wait a day or two. :)
Fast forward the video to about 19m40s.
Do you know if the Costco oil contains just the C8 and C10 mct chains, or does it contain C12 as well, because the C12 (Lauric acid) is inferior. I paid about $24 for 32 Oz. for Left Coast mct oil on amazon.