This study shows that a ketogenic diet slows early Alzheimer’s memory loss in mice, in which the molecule beta-hydroxybutyrate (BHB), plays an important role thus offering hope for its application in human ageing and cognitive health.
https://www.nature.com/articles/s42003-024-05860-z (open access).
This is in line with the idea that AD is a form of diabetes.
Alzheimer’s Disease Is Type 3 Diabetes–Evidence Reviewed:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2769828/