Fiber plays a crucial role in maintaining healthy cholesterol levels by binding to bile acids in the gut and promoting their excretion. This process reduces the amount of cholesterol reabsorbed into the bloodstream, leading to lower overall levels. Soluble fiber, in particular, is effective as it can lower LDL (bad cholesterol) levels while raising HDL (good cholesterol) levels. A diet rich in fruits, vegetables, whole grains, and legumes supports heart health and contributes to better cardiovascular health.