What is the role of fiber in a healthy diet?

The role of fiber in a healthy diet primarily revolves around aiding digestion and preventing constipation. Fiber is a crucial component of plant-based foods and contributes to digestive health in several ways. It adds bulk to the stool, which helps keep it soft and facilitates regular bowel movements. By promoting regularity, fiber can help prevent constipation and reduce the risk of developing more serious gastrointestinal problems.

In addition to these benefits, fiber has a role in promoting overall gut health and can contribute to a feeling of fullness, which may help with weight management. Dietary fiber is categorized into soluble and insoluble types, both of which offer different but complementary health benefits. Soluble fiber can help regulate blood sugar and lower cholesterol levels, while insoluble fiber aids in digestive health by promoting the movement of food through the intestines.

The other options refer to aspects that fiber does not fulfill. While energy for physical activities is mainly derived from carbohydrates and proteins, fiber itself does not provide energy as it is not easily digestible. Fiber does not increase cholesterol levels; in fact, soluble fiber can help lower them. As for promoting muscle growth, it is protein that serves this purpose, not fiber. Therefore, the correct answer highlights the essential function of fiber in maintaining a healthy digestive system and preventing