I suppose that I am missing something. Exactly what is this article trying to suggest should be done to prevent age related “brain decline”? It seems to hint at changes in diet, but no specific guidelines are given.
The researchers identified its primary driver: neuronal insulin resistance.
“This research suggests that metabolic intervention—whether through dietary approaches like ketogenic diets or supplements—might be most effective when started in one's 40s, well before cognitive symptoms appear.”
Curbing all forms of insulin resistance would appear to be helpful.