By Dr. Royal Lee

Summary: In this paper on the relationship between cooking fats and blood cholesterol, pioneering nutritional therapist Dr. Royal Lee emphasizes the importance of phospholipids in the former for metabolizing the latter. While natural, unrefined oils such as crude peanut oil contain such phospholipids, he says, synthetic hydrogenated fats do not (because they are destroyed in the manufacturing process). Dr. Lee cites studies in which a diet of high-fat, high-cholesterol foods cooked in unrefined natural oil led to a decrease in blood cholesterol, whereas a diet of foods cooked in hydrogenated fats raised it. From Vitamin Products Company, circa 1956.