What are the primary functions of carbohydrates in the human body?

Carbohydrates are essential macronutrients in the human diet, primarily serving as a key energy source for the body. One of the ways they accomplish this is by breaking down into glucose, which is utilized by the body's cells for fuel. This process is vital for sustaining physical activity, supporting brain function, and maintaining overall metabolic processes.

In addition to providing energy, carbohydrates play a critical role in regulating blood glucose levels. They influence how quickly glucose is released into the bloodstream, impacting insulin response and overall glucose metabolism. This regulation is particularly important for individuals managing conditions like diabetes, where maintaining stable blood sugar levels is crucial.

Other options touch on different nutrient functions—fats are essential for providing essential fatty acids, proteins are crucial for tissue building and repair, and some carbohydrates aid in the absorption of certain vitamins and minerals—but they do not encapsulate the primary roles of carbohydrates in energy provision and glucose regulation as accurately as the correct choice does.