Maybe there is something to this. During the past 10 years or so my parents became vegetarians. They both had strokes. My mother died from multiple strokes.

I bet. They use all veggie fats, and it's been noted that due to the (extremely) high amount of omega fats in vegetable/canola/soybean/etc oil, it's actually super bad for your heart, among other things, long-term. I've switched back to lard for the past few months, and have been more energetic and alert, overall. Anecdotal, but I feel "cleaner" after eating something fried in lard than in vegetable oil.