Certified Dietary Manager (CDM) Practice Exam

What is the primary function of fiber in the diet?

1. To provide energy

2. To aid in digestion and promote regular bowel movements

3. To support muscle repair

4. To enhance flavor in food

The correct answer is: To aid in digestion and promote regular bowel movements

The primary function of fiber in the diet is to aid in digestion and promote regular bowel movements. Fiber, which is a type of carbohydrate that the body cannot digest, plays a crucial role in maintaining digestive health. It adds bulk to the stool, which helps to keep the digestive tract running smoothly by facilitating regularity and reducing the likelihood of constipation. Dietary fiber can be classified into two categories: soluble and insoluble. Soluble fiber dissolves in water and can help lower blood cholesterol and glucose levels, while insoluble fiber adds bulk to the stool and aids in the movement of food through the digestive system. Both types contribute to digestive health by fostering a healthy gut environment and preventing issues such as diverticulitis and hemorrhoids. While other options present important dietary components, they do not align with the primary role of fiber. Fiber does not primarily provide energy, support muscle repair, or enhance flavor in food, making its primary function in promoting digestion and regular bowel movements essential for overall health.