What is the primary role of fiber in a diet?

The primary role of fiber in a diet is to support digestive health. Fiber is essential for maintaining a healthy digestive tract; it aids in the regularity of bowel movements by adding bulk to the stool, which helps to prevent constipation. Additionally, fiber contributes to a feeling of fullness, which can help in maintaining a healthy weight. By promoting gut health and facilitating the movement of food through the digestive system, fiber plays a crucial role in overall digestive function.

While fiber does have other beneficial effects, such as potentially regulating cholesterol levels and playing a part in energy absorption, its most defining role is in promoting digestive health.