The saturated fats that are in butter, bacon and fatty meals are bad for your health because they contain cholesterol that can clog up your arteries and cause heart disease. Reduce the amount of bad fat you consume by choosing lean meals, avoiding fried food and limiting the amount of butter and margarine you eat. Unsaturated fats are butter for better for your health. They can be found in some plant food such as avocado and olives and also in fish