Final answer:
Whole grain products contain high amounts of dietary fiber, an indigestible complex carbohydrate that aids in digestive health, controls blood glucose, and contributes to fullness without adding calories.
Step-by-step explanation:
Whole grain products are high in an indigestible carbohydrate called fiber. Fiber is a complex carbohydrate that the body cannot fully break down, so it passes through the digestive system without providing caloric energy. However, fiber plays crucial roles in maintaining gastrointestinal health, controlling blood glucose levels, aiding in weight management by providing a feeling of fullness, and keeping the digestive system flowing.
Dietary fiber can be found in two forms: soluble and insoluble. Soluble fiber dissolves in water and helps slow the absorption of nutrients, reducing insulin spikes, while insoluble fiber, such as cellulose, promotes regularity and prevents constipation. Foods rich in fiber, like whole grain bread which contains about 15 grams of carbohydrates per slice, help contribute to daily intake requirements and support overall health.