Trans fats are considered the worst type of fat for human health and are definitely not “good” fats. They are created through a process called hydrogenation, which turns liquid oils into solids to extend shelf life — commonly used in processed snacks, baked goods, margarine, and fast food. Trans fats raise bad LDL cholesterol, lower good HDL cholesterol, and are strongly linked to an increased risk of heart disease, stroke, and type 2 diabetes. Because of their dangers, many countries — including the U.S. — have significantly limited or banned the use of artificial trans fats in foods. Even in small amounts, trans fats are harmful and offer no nutritional benefit. If you're reading a nutrition label and see “partially hydrogenated oils,” it means trans fats are present. For better heart and overall health, it’s best to avoid trans fats entirely and choose unsaturated fats like monounsaturated and polyunsaturated fats instead.