Of all the possible improvements you can make to your diet, limiting saturated fats and cutting out trans fats entirely is perhaps the most important. Both types of fat raise your LDL, or “bad” cholesterol level, which can increase your risk for heart attack and stroke. Luckily, there are many ways to control how much saturated and trans fats you take in. Keep these culprits in mind as you cook and make food choices—and learn how to avoid them.