Good fats, such as omega-3 fatty acids, monounsaturated fats and small quantities of high-quality saturated fats like organic butter, are essential to the health of your brain and must be consumed daily. The fats to watch out for are polyunsaturated vegetable fats that have been cheaply processed for use in fast food. They contain omega-6 fatty acids, found in abundance in the “supersized” standard American diet...