"Their diets were more than 90% plant-based"
https://nutritionfacts.org/video/why-was-heart-disease-rare-in-the-mediterranean/
This is rather amazing: "the rate of fatal heart disease on the Greek isle of Crete was 20 times lower than in the United States"
One thing I alway find a bit funny is that an article on the Mediterrean diet usually has a picture of a huge piece of salmon (way about 10%) and salmon isn't even found in the Mediterrean ¯\_(ツ)_/¯