What is the primary purpose of dietary fiber?

The primary purpose of dietary fiber is to aid digestion. Dietary fiber, which is mostly found in plant-based foods, plays a crucial role in promoting healthy bowel movements by adding bulk to the stool and facilitating its passage through the digestive tract. This helps to prevent constipation and contributes to overall digestive health. Additionally, fiber can also support a healthy gut microbiome by serving as a food source for beneficial bacteria in the intestines, further enhancing digestive function.

While some types of fiber can have other health benefits, such as helping to regulate blood sugar levels and lower cholesterol, its main role is related to digestion. This characteristic makes fiber an essential component of a healthy diet, particularly for maintaining gastrointestinal health and preventing disorders such as irritable bowel syndrome and diverticulitis.