Interesting.

High- and Low-Fat Dairy Consumption and Long-Term Risk of Dementia
Evidence From a 25-Year Prospective Cohort Study

Discussion

Higher intake of high-fat cheese and high-fat cream was associated with a lower risk of all-cause dementia, whereas low-fat cheese, low-fat cream, and other dairy products showed no significant association. APOE ε4 status modified the association between high-fat cheese and AD. Our study's observational design limits causal inference.