Protein is an essential nutrient needed on a daily basis by the human body. The Centers for Disease Control and Prevention believe that most Americans consume more protein than they need to meet their daily requirements. There are occasions, such as pregnancy and in conjunction with certain medical conditions, that additional stress on the body causes higher protein demands. While obtaining extra protein from food sources is ideal, occasional use of protein supplements may be necessary.
Protein has a major role in the body, such as building and repairing muscles and bones after times of stress or injury. These times include vigorous activity when muscles are damaged during extreme exercise, and in relation to medical conditions such as surgery and dialysis. Georgetown University educates its students on the importance of protein for immune function to keep the body healthy to resist illness. Protein provides the body with energy in the form of calories. Protein is also made up of nitrogen, essential to all living beings.