Good fats can help you manage your emotions, stay sharp, fight fatigue, and control your weight. But bad fats do exist. They're the ones that can lead to weight gain and raise your risk of heart disease.
Of the four major types of fats, two are good fats: monounsaturated fats and polyunsaturated fats. They're mostly liquids at room temperature. An example is olive oil. The other two are bad fats: trans fats and saturated fats. They tend to be solid, like butter.
What You Should Know About Good Fats