Which dietary component is primarily used for immediate energy supply?

Carbohydrates are primarily used for immediate energy supply because they are the body's preferred source of fuel, especially during high-intensity activities. When carbohydrates are consumed, they are broken down into glucose, which is readily available for energy. This process allows for quick access to energy, making carbohydrates essential for activities that require rapid bursts of energy.

Unlike fats, which serve as a long-term energy reserve and are metabolized more slowly, carbohydrates can be quickly utilized by the body. While proteins can also provide energy, their primary role is to support growth, repair tissues, and serve as enzymes and hormones rather than being a primary energy source. Vitamins play crucial roles in various metabolic processes, but they do not provide energy directly. Thus, carbohydrates are uniquely positioned as the most immediate energy source for the body.