Well, one grandmother died of heart disease and one has Type II diabetes. Ruh roh!
They consumed a George McGovern diet: plenty of hydrogenated oils (margarine was so preferable to butter, you know), corn, white bread, and pasta.
My grandparents were all immigrants. And they and assorted relatives switched to or ate this 'new' McGovern diet during the 60's & 70's. And it didn't do anything good for my grandmother's health. I remember the older relatives lamenting that after coming to America, the American born relatives were far less healthy (especially on my father's side), and they blamed the change in diet. Those who stuck to the 'old' ways longer, with healthy American additions, did better. My grandfather loved brown bread spread with a thick smear of lard. He lived to 92.
My grandmother loved raw onions. I can't eat them raw, or even partly cooked.