Trans fat is a type of unsaturated fat that can be found in some processed foods. It is created through a process called hydrogenation, which turns liquid oils into solid fats. Trans fats are often used in margarine, baked goods, and fried foods to improve texture and shelf life. Consuming trans fats can increase the risk of heart disease by raising bad cholesterol levels while lowering good cholesterol levels. Many countries have implemented regulations to limit or ban trans fats in food products, encouraging healthier alternatives to protect public health.