The fat content of the modern Western diet is high in saturated and trans-fatty acids and low in monounsaturated and polyunsaturated fats; the main dietary sources are fatty meats, baked goods, cheese, milk, margarine, and butter. This balance, which is opposite of that hypothesized in the preagricultural diet, is related in particular to cardiovascular disease, which has been shown to be more sensitive to the ratio of different types of fat than to the absolute amount consumed. The widespread consumption of processed vegetable fats in the modern diet has also changed the ratio of fats concerned, ...