Ideally, we should avoid packaged foods. Realistically, that is not practical. Therefore, make it a habit to read fully the nutritional labels on packaged foods. And it is extremely important to know what all those terms mean. Follow this link for a primer.
Not all fats are created equally. Some provide necessary nutrients. When planning our healthy nutrition, we want to avoid saturated and trans fats. Follow this link for a brief summary on identifying and avoiding these “bad” fats. And how to identify and include “good” fats.