Which of the following fats are known to be harmful and typically found in processed foods?

Trans fats are considered harmful due to their adverse effects on health, particularly in relation to heart disease. These fats are often found in processed foods because they are created through the hydrogenation process, which gives oils a longer shelf life and a desirable texture for many products, such as baked goods, margarine, and snack foods.

The consumption of trans fats raises levels of low-density lipoprotein (LDL) cholesterol, also known as "bad" cholesterol, while lowering levels of high-density lipoprotein (HDL) cholesterol, or "good" cholesterol. This imbalance significantly increases the risk of cardiovascular complications, including heart attacks and strokes.

In contrast, saturated fats, while they can also elevate cholesterol levels, are not as universally harmful as trans fats and are often naturally occurring in animal products and some plant oils. Monounsaturated and polyunsaturated fats are typically considered healthy fats, contributing to overall health by supporting heart health and lowering cholesterol levels when consumed in moderation.