What is the main function of carbohydrates in the body?

Carbohydrates play a crucial role in the body primarily as a source of energy. When consumed, carbohydrates are broken down into glucose, which is used by the body's cells to fuel various functions, including physical activity and organ operation. This process makes carbohydrates a fundamental macronutrient, essential for maintaining energy levels throughout the day.

While hormones, muscle building, and immune responses are critical functions in the body, they are not primarily fulfilled by carbohydrates. Hormonal regulation mainly involves proteins and lipids, muscle building relies on proteins, and immune function is supported by a combination of proteins, vitamins, and minerals. Therefore, the unique position of carbohydrates as the body's main energy source underlines their importance in nutrition and overall health.