Trans fats raise LDL "bad" cholesterol and make you more likely to get heart disease. They also lower HDL "good" cholesterol.trans fat that comes from partially hydrogenated amounts of natural trans fats found in beef, lamb, and full-fat dairy products. Companies have three years (from 2015) to phase out artificial trans fats from their products.
Food makers once used artificial trans fats to enhance the flavor, texture, and shelf life of processed foods. You might have seen those trans fats listed as "partially hydrogenated oils."