Hydrogenated oils are fats that have been chemically altered to become more solid at room temperature. This process involves adding hydrogen to liquid oils, which helps improve their shelf life and stability. Common sources of hydrogenated oils include soybean oil, canola oil, and palm oil. These oils are often used in processed foods, such as baked goods and margarine, to enhance texture and flavor. However, hydrogenated oils can contain trans fats, which are linked to health issues like heart disease. As a result, many health organizations recommend limiting their consumption.