Why are processed foods often high in unhealthy fats?

Processed foods are often high in unhealthy fats primarily because they may contain trans fats. Trans fats are artificial fats created during the hydrogenation process, which is used to solidify liquid oils and extend the shelf life of processed foods. These fats are commonly found in many types of processed items, including baked goods, snacks, and fried foods. The presence of trans fats not only enhances the texture and palatability of products but can also increase stability during storage, leading manufacturers to incorporate them despite their health risks.

In contrast, the other options do not accurately describe the characteristics of processed foods. Natural oils are typically healthier fats, and preservatives, while present in many processed foods, do not inherently contribute to unhealthy fat content. Lastly, being rich in whole grains is a positive attribute that usually indicates healthier food choices, not a feature often associated with processed foods. Thus, the connection between processed foods and unhealthy fats is most clearly represented by the potential inclusion of trans fats.