The modern Western diet, comprising 75% processed foods, is primarily composed of sugar, refined wheat flour, nutrient-deficient cereal grains, vegetable oils, and trans fats.

“the diet the entire diet has almost become it's become 75 processed in other words so those there's four things basic basically that have changed in 200 years and it's sugar refined wheat flour or refined uh cereal grains which are nutrient deficient vegetable oils which we didn't have and trans fats and between 1866 and 2009 we went basically from almost zero processed foods the only thing we had in 1865 was sugar in really small quantities and by 2009 63 of the american diet is processed food and 75 percent of the of americans diet is i'm sorry 63 would be considered ultra processed 75 is processed the world's diet now is considered 75 processed food meaning it's mostly made up of those four ingredients sugars refined wheat flour uh vegetable oils and trans fats”