Which nutrient is primarily responsible for energy production in the body?

Carbohydrates are primarily responsible for energy production in the body. They are quickly broken down into glucose, which is the main fuel source for cells, especially during high-intensity exercise and for brain function. When consumed, carbohydrates undergo digestion and are converted into glucose, which can then be utilized immediately for energy or stored as glycogen in the liver and muscles for later use.

Fats also play a significant role in energy production but are utilized more efficiently during lower-intensity activities and prolonged endurance exercise. While proteins can be used as an energy source, they primarily function in growth, repair, and maintenance of body tissues, rather than being the body’s preferred energy source. Vitamins do not directly provide energy but are essential for various metabolic processes that include energy production pathways.