What is the primary dietary source of fiber?

The primary dietary source of fiber consists of fruits, vegetables, whole grains, and legumes. These food groups are rich in dietary fiber, which is essential for maintaining digestive health, regulating blood sugar levels, and supporting overall wellness. Fruits and vegetables, especially when consumed with their skins, can provide significant amounts of soluble and insoluble fiber, while whole grains contain bran and germ that contribute fiber content to the diet. Legumes, such as beans and lentils, are particularly high in both fiber and protein, making them an excellent choice for those looking to increase their fiber intake.

In contrast, processed foods are often low in fiber due to refining processes that strip away the bran and germ from grains, making them less nutritious. Meat does not contain dietary fiber, as it is an animal product and does not have the plant-based components needed for fiber. Dairy products also contain negligible amounts of fiber, primarily providing protein and calcium instead. These differences highlight why the chosen answer is the most accurate representation of the primary dietary sources of fiber.