Fiber is a large category of compounds, including lignin and complex carbohydrates that cannot be digested by human enzymes in the small intestine.

Good sources of dietary fiber include legumes, nuts, whole grains, bran products, fruits and nonstarchy vegetables. Legumes, whole grains and nuts are richer sources of fiber than fruits and vegetables. All plant-based foods contain mixtures of soluble and insoluble fiber. Oat products and legumes are good sources of soluble fiber. Wheat bran and Start eating more fruits and vegetables, particularly beans.

Start your day with whole grain cereal or oatmeal for breakfast and always substitute whole grains for refined grains. Nuts always make for good snacks.whole grains are rich sources of insoluble fiber.