How does increasing fiber in the diet benefit heart health?

Increasing fiber in the diet benefits heart health primarily by reducing cholesterol levels. Dietary fiber, particularly soluble fiber, has been shown to trap dietary cholesterol and bile acids in the digestive system, which prevents their absorption into the bloodstream. This process helps lower the levels of low-density lipoprotein (LDL) cholesterol, often referred to as "bad" cholesterol. Lower LDL cholesterol levels are associated with a reduced risk of heart disease and stroke.

In addition to cholesterol reduction, a high-fiber diet can also help maintain a healthy weight and regulate blood sugar levels, both of which contribute to overall cardiovascular health. Foods high in fiber, such as fruits, vegetables, whole grains, and legumes, often contain other beneficial nutrients that support heart function and overall well-being.

The other options do not support heart health; for example, increasing blood pressure is not beneficial for cardiovascular health, nor does promoting fat gain or decreasing physical activity align with the principles of maintaining a healthy heart. Thus, the focus on fiber’s role in cholesterol reduction is crucial for understanding its positive effects on heart health.