The premise behind this notion is that saturated fat would raise LDL cholesterol, which in turn would clog the arteries and lead to heart diseases. Many studies were done, however they all had one fatal flaw. The studies showing a link between saturated fats and heart disease were also grouping trans fats into the same category. Trans fats are fat molecules which have literally been transformed, such as the hydrogenation process vegetable oils undergo to become margarine.