Learn to read between the lines when it comes to nutritional labeling so you won’t be fooled. Perhaps trickiest of all is trans fats. You won’t find these listed as trans fats at all, but rather ingredients that contain trans fats: mainly partially hydrogenated oil and hydrogenated oil. Trans fats can elevate your risk of developing heart disease and stroke. These fats raise your bad cholesterol (LDL) and decrease your good cholesterol (HDL).