Answer: Trans-fats and saturated fats
Explanation: Trans fats are a type of unsaturated fat that are commonly found in processed foods, such as baked goods, fried foods, and snack foods. They are created through a process called hydrogenation, which turns liquid vegetable oils into more solid fats. Trans fats have been shown to increase LDL ("bad") cholesterol levels and decrease HDL ("good") cholesterol levels in the body, which can contribute to the development of plaque in the arteries.
Saturated fats are another type of fat that can contribute to the build-up of plaque in the arteries. They are found in animal products such as meat, cheese, and butter, as well as some plant-based oils such as coconut oil and palm oil. While some saturated fats can have neutral or even beneficial effects on cholesterol levels, others can increase LDL cholesterol levels and contribute to the development of heart disease.
In contrast, unsaturated fats, such as those found in nuts, seeds, fish, and vegetable oils, have been shown to have beneficial effects on cholesterol levels and reduce the risk of heart disease. It's important to choose healthy sources of fats and limit intake of trans fats and saturated fats to help maintain heart health.