The role of fiber in reducing cholesterol levels is significant, as soluble fiber can bind to bile acids in the intestines. This binding process helps to lower serum cholesterol levels by promoting its excretion from the body. Foods high in soluble fiber, such as oats, beans, and fruits, can effectively modulate lipid levels. Regular consumption of fiber-rich foods not only contributes to heart health but also supports digestive function. Incorporating a variety of fiber sources into the diet can play a critical role in reducing the risk of cardiovascular disease.