Managing cholesterol levels through diet involves focusing on foods that can help lower LDL cholesterol (harmful) and raise HDL cholesterol (beneficial). Key approaches include increasing the intake of soluble fiber from sources like fruits, vegetables, and whole grains, which can help absorb cholesterol. Incorporating healthy fats, such as those from nuts, olive oil, and fish, is also vital. Additionally, reducing trans fats and saturated fats can significantly contribute to improved cholesterol levels and overall heart health.