How are carbohydrates primarily used by the body?

Carbohydrates are primarily used by the body as a major source of energy. When consumed, carbohydrates are broken down into glucose, which is then utilized by cells for energy to support various bodily functions, including physical activity, brain function, and metabolic processes. This energy source is particularly crucial during high-intensity workouts and activities where quick energy is needed.

While carbohydrates can play secondary roles in other metabolic pathways, their primary role is energy provision, which is why they are considered the body's main fuel source. Other options, such as hormone balance and muscle repair, involve different macronutrients like proteins and fats, and thus are not the primary functions of carbohydrates.