Avoid trans fats whenever possible. There are a few different types of fats, classified based on their molecular structure. They are unsaturated fats, saturated fats, and trans fats. Generally speaking, unsaturated fats and some saturated fats, which are found in avocados, egg yolks, red meat, nuts, coconut, and fish, are the “good fats.” Trans fats, on the other hand, have been associated with a higher risk of heart disease and other negative effects. They are often found in fried and heavily processed foods.