What dietary component is recommended to help lower cholesterol levels?

Soluble fiber is recommended for lowering cholesterol levels due to its ability to bind to cholesterol in the digestive system. When soluble fiber is consumed, it forms a gel-like substance that helps to absorb cholesterol and bile acids, leading to their excretion from the body. As a result, this process can lower total and LDL (low-density lipoprotein) cholesterol levels in the bloodstream. Foods rich in soluble fiber include oats, beans, lentils, fruits like apples and oranges, and some vegetables.

In contrast, saturated fats and trans fats are generally associated with raising cholesterol levels. Saturated fats can increase levels of LDL cholesterol, which is often referred to as "bad" cholesterol, while trans fats have been found to not only boost LDL cholesterol but also reduce HDL (high-density lipoprotein) cholesterol, which is considered "good" cholesterol. Therefore, reducing intake of saturated and trans fats is typically advised for heart health, while increasing soluble fiber is encouraged to help manage and improve cholesterol levels.