Dietary Fiber Roughage or bulk, another name for dietary fiber, refers to the components of plant food that your body cannot digest or absorb. Fiber isn’t processed by your body like other meal ingredients like lipids, proteins , or carbohydrates that it breaks down and absorbs. Instead, it exits your body through your colon, small intestine, and stomach largely undamaged. Categories of Fiber Fiber is often categorized as either soluble (dissolves in water) or insoluble (does not dissolve). Insoluble fiber: those who experience constipation or irregular stools may find this sort of fiber helpful since it encourages the passage of material through your digestive tract and improves stool bulk. Insoluble fiber can be found in abundance in whole-wheat products including flour, wheat bran, nuts, beans, and vegetables like potatoes, cauliflower, and green beans. Soluble fiber: This kind of fiber breaks down in water to create a gel-like substance. It can aid in lowering blood sugar and ch