Which nutrient is primarily responsible for energy?

Carbohydrates are primarily responsible for providing energy to the body. They are broken down into glucose, which is the main fuel source for our cells, particularly for the brain and muscles during physical activity. When consumed, carbohydrates are converted into glucose and then either used immediately for energy or stored in the liver and muscles for later use.

Proteins primarily serve structural and functional roles in the body, such as building and repairing tissues, and while they can be used for energy, it is not their primary function. Fats serve as a concentrated energy source and are also essential for the absorption of fat-soluble vitamins and hormone production, but they typically provide energy during prolonged physical activity rather than being the body's first source. Vitamins, on the other hand, are vital for various metabolic processes but do not provide energy themselves. Thus, carbohydrates are the most efficient and preferred source of energy for the body.