What is the primary function of dietary fiber?

The primary function of dietary fiber is to support digestive health. Fiber plays a crucial role in maintaining bowel regularity by adding bulk to the stool, which helps to prevent constipation. It also promotes the growth of beneficial gut bacteria, which contribute to a healthy gut microbiome and can enhance overall digestion and nutrient absorption. Additionally, certain types of fiber, known as soluble fiber, can help to regulate blood sugar levels and lower cholesterol, further supporting cardiovascular health.

Although fiber does have a low caloric content, it is not intended to provide energy like carbohydrates or fats and does not contribute to an increase in calorie intake. Enhancing flavor is not a primary role of dietary fiber, even though fiber-rich foods can contribute to the overall taste and texture of a meal. These factors highlight why dietary fiber is essential for a balanced diet focused on supporting digestive health.