Research has shown that omega-3s help prevent and even treat heart disease and stroke.
Monounsaturated fats. These fats should be used as much as possible along with polyunsaturated fats to replace the bad saturated fats and trans fats. Good sources of monounsaturated fats are olive oil, peanut oil, canola oil, avocados, and most nuts
Saturated fats. There are about 24 different saturated fats. Not all of them are equally bad for your health. The saturated fat found in butter, whole milk, cheese, and other dairy products increases LDL levels the most, followed by the saturated fat in beef. Curiously, the saturated fat called stearic acid, found in pure chocolate, is more like unsaturated fat in that it lowers LDL levels.
Trans fats (partially hydrogenated oils). These fats occur naturally in meat, but their main dietary source is packaged baked products such as cookies, cakes, breads, and crackers, as well as fast foods and some dairy products.
i believe fat is the most imporant nutrient is because even though some fat is bad there is also good fat so a 50 out of 50. without Some fats itsbeen found to be helpful in preventing some cancers and heart disease. Also, if there was no fat then there would be no fast food places and then we would definitaly have more unemployed workers as we do now.