Whether you have heart disease, diabetes, or digestive issues, such as constipation or diverticulosis, you probably have been told to follow a high-fiber diet. Read on to learn about fiber's benefits, how much you need and how to get more fiber. Fiber's Benefits Dietary fiber is found in fruits, vegetables, whole grains, legumes, and nuts.  It has amazing benefits – it regulates bowel movements, feeds gut bacteria, reduces inflammation in the gut, balances cholesterol levels