The Ketogenic Diet as a Treatment Paradigm for Diverse Neurological Disorders https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3321471/

Effects of ketone bodies in Alzheimer's disease in relation to neural hypometabolism, β‐amyloid toxicity, and astrocyte function https://onlinelibrary.wiley.com/doi/full/10.1111/jnc.13107

"Diet supplementation with ketone bodies (acetoacetate and β‐hydroxybuturate) or medium‐length fatty acids generating ketone bodies has consistently been found to cause modest improvement of mental function in Alzheimer's patients. It was suggested that the therapeutic effect might be more pronounced if treatment was begun at a pre‐clinical stage of the disease instead of well after its manifestation."