What effect does consuming a high-fiber diet, rich in whole grains and vegetables, typically have on stool production?

It produces firmer, more regular stools because the fiber adds necessary bulk

Dietary composition directly influences the quality and regularity of output from the bowels. Fiber, found abundantly in whole grains and vegetables, is noted for its non-digestible nature, which allows it to remain within the intestinal tract. This fiber functions by adding necessary bulk to the waste material as it moves through the colon. This increased volume acts as an internal sweeping agent, supporting more structured and regular movement through the large intestine. The result is typically the production of stools that are firmer and easier to pass, contrasting with stools lacking bulk which can sit longer and become harder due to excessive water reabsorption.