How does increased fiber intake benefit digestive health?

Increased fiber intake is beneficial for digestive health primarily because it helps prevent constipation. Fiber adds bulk to the stool, which aids in its movement through the intestines. This bulk helps stimulate the bowel, encouraging regular contractions that facilitate bowel movements. Additionally, fiber can retain water, which softens the stool, making it easier to pass. A diet rich in both soluble and insoluble fiber can regulate bowel movements and reduce the likelihood of digestive issues such as constipation.

The other options do not accurately reflect the effects of fiber on digestive health. For instance, increasing fiber does not decrease bile production, rather, it can actually promote the recycling of bile acids. Increased fiber intake typically leads to more regular bowel movements, not irregular ones, and while fiber contributes to overall digestive health, it does not enhance fat digestion directly—its primary roles involve promoting satiety and regulating sugar absorption.