Trans Fats
If the unsaturated fats are "good," and the saturated fats are "bad," then the trans fatty acids could be considered "sinister." Obtained from foods like margarine, baked goods, processed foods, and fast foods, trans fatty acids are known to increase the risk of many chronic diseases, promote inflammation, and worsen lipid profiles (by decreasing both HDL and LDL). In fact, it is estimated that 200,000 heart attacks could be prevented each year if we eliminated trans fats from our diets (9). Our goal should be no trans fats in our diets at all, period.
Warning!
Any food with partially hydrogenated fats listed in the ingredients contains some amount of trans fats, even if the label states "0 grams of trans fats." Food manufacturers are allowed to round down if the product contains 0.5 grams of trans fats per serving or less. This can add up!