Carbohydrates serve as a primary and efficient source of energy for the body. When consumed, complex carbohydrates such as starches and sugars are broken down into glucose during digestion. This glucose is then absorbed into the bloodstream, where it travels to cells for energy production. Through cellular respiration, glucose undergoes metabolic processes to generate adenosine triphosphate (ATP), the body’s energy currency. Vital organs, muscles, and various physiological functions heavily rely on ATP for fuel. Carbohydrates also spare proteins from being used as an energy source, ensuring proteins can fulfill their primary roles in growth, repair, and maintenance of tissues.