Final answer:
The two main types of fiber are soluble fiber and insoluble fiber. Soluble fiber dissolves in water and can be fermented by gut bacteria, while insoluble fiber adds bulk to the stool.
Step-by-step explanation:
The two main types of fiber are soluble fiber and insoluble fiber. Soluble fiber dissolves in water and forms a gel-like substance in the digestive tract. It can be fermented by bacteria in the gut and has been associated with various health benefits. Insoluble fiber, on the other hand, does not dissolve in water and adds bulk to the stool, promoting regular bowel movements. Examples of soluble fiber include oatmeal, beans, and fruits, while examples of insoluble fiber include whole grains, nuts, and vegetables.