Dietary fiber comes from plants: think fruits, vegetables, grains, legumes, beans, nuts and seeds. Diets higher in fiber can help lower cholesterol, control blood sugar, maintain bowel health, manage constipation and help promote a healthy weight. In fact, in epidemiological studies, populations with higher dietary fiber intakes tend to have lower chronic disease rates overall. A higher fiber intake provided by foods like fruits, vegetables, legumes, and whole- and high-fiber grain products is likely to be lower in calories, fat and added sugar.