Polyunsaturated vegetable oils were virtually absent from the human diet before their introduction in the late 19th century.

“the entire world had never seen a polyunsaturated vegetable oil at least i would say 99.9 plus percent of the world had never seen a polyunsaturated fatty acid type vegetable oil what we call vegetable oil seed oil seed oils”

“And just so people understand the context of these oils, never in the American diet or really western diet until 100 years ago with Proctor and Gamble and the, you know, the creation of Crisco.”

“If you think about it historically, no seed oils in the human diet before 110 years ago.”