AFAA Personal Trainer Certification Practice Exam

What type of fiber is primarily found in fresh fruits, vegetables, and grains?

1. Soluble Fiber

2. Insoluble Fiber

3. Digestible Fiber

4. Functional Fiber

The correct answer is: Soluble Fiber

The type of fiber primarily found in fresh fruits, vegetables, and grains is soluble fiber. Soluble fiber has the ability to dissolve in water, forming a gel-like substance in the digestive tract. This characteristic allows it to help regulate blood sugar levels and lower cholesterol by binding to bile acids. Sources high in soluble fiber include oats, apples, citrus fruits, and barley, all of which contribute to heart health and digestive well-being. While insoluble fiber, found in whole grains and legumes, also plays a vital role in gut health by promoting regular bowel movements, the question specifically asks about the fiber found in fresh fruits, vegetables, and certain grains, where soluble fiber is more prevalent. Digestible fiber is not a recognized category, and functional fiber is a term that refers to isolated fibers added to foods or supplements, rather than those naturally occurring in whole foods. This highlights the emphasis on soluble fiber as it pertains to the composition of fresh produce and its beneficial effects on health.