Which food group is the best source of complex carbohydrates?

Whole grains are recognized as the best source of complex carbohydrates due to their high fiber content and essential nutrients. Complex carbohydrates consist of longer chains of sugar molecules, which the body breaks down more slowly than simple carbohydrates, providing sustained energy. Whole grains, such as brown rice, quinoa, oats, and whole wheat products, retain their bran and germ, contributing not only to the carbohydrate content but also to vitamins, minerals, and dietary fiber. This combination makes them particularly beneficial for maintaining stable blood sugar levels and supporting digestive health.

Other food groups listed, such as fruits, dairy products, and meats, do contain some carbohydrates, but they primarily consist of simple sugars or are rich in proteins and fats rather than complex carbohydrates. Fruits provide natural sugars and fiber, but they are not as concentrated in complex carbohydrates as whole grains. Dairy products primarily contain lactose, a simple sugar, and while meats are abundant in protein, they contain negligible carbohydrates. Therefore, whole grains stand out distinctly as the superior source for complex carbohydrates in the diet.