which of the essential nutrients is the body's main source of energy?
Essential Nutrients That Supply Energy Photo Credit: Yulia_Davidovich/iStock/Getty Images The body requires energy to sustain itself and perform all the functions of daily life. The process of converting nutrients from food into energy is called cellular respiration. The energy from this biochemical process is captured in a chemical called adenosine triphosphate (ATP). Subsequent breakdown of ATP releases the energy needed to drive cellular functions. Carbohydrate, fat and protein provide the fuel needed for energy production from food. Additionally, thiamin, niacin, riboflavin and other B vitamins help with the conversion of nutrients into energy. Video of the Day