Which substance is known to have a positive effect on digestion?

Fiber is known to have a positive effect on digestion due to its ability to promote regular bowel movements and overall gut health. It adds bulk to the stool, which helps food to move more easily through the digestive tract, preventing constipation. Additionally, dietary fiber can foster a healthy balance of gut bacteria, which is essential for optimal nutrient absorption and digestion. Consuming adequate fiber from sources like fruits, vegetables, whole grains, and legumes can enhance digestive efficiency and may also help prevent digestive disorders.

In contrast, while fat, sugar, and protein are essential macronutrients, they do not similarly enhance digestive health in the same way that fiber does. Fats can slow down digestion, sugars can lead to imbalances in gut bacteria when consumed in excess, and while proteins play a role in building and repairing tissues, they do not contribute to digestive regularity like fiber does.