The first is saturated fat, found mainly in animal sources like fatty meats, and whole milk dairy products, such as butter, cream and cheese.
Avocados are one of the few vegetables with saturated fat.
Tropical oils like palm and coconut are another source, and often found in commercial baked goods. Too much saturated fat increases your cholesterol levels, because saturated fat is what the liver uses to manufacture cholesterol. Polyunsaturated fats include corn, sesame, sunflower and soybean oil. The third type of fat is monounsaturated, which occurs in canola, olive and peanut oils. Monounsaturated fats are thought to be the healthiest, because they tend not to raise cholesterol as much.