The primary purpose of carbohydrates in the human diet is to provide a quick and accessible source of energy for the body. They are broken down into glucose, which fuels cells, tissues, and organs, including the brain. Carbs also play a role in spurring the release of insulin, facilitating nutrient absorption. While simple carbohydrates offer immediate energy, complex carbohydrates provide sustained energy over time. A balanced diet with an appropriate amount of carbohydrates is essential for supporting physical activity, cognitive functions, and overall health.