Protein plays a fundamental role in supporting the Structural System, which includes bones, muscles, tendons, ligaments, skin, and connective tissues. There is robust scientific evidence validating the importance of dietary protein for the maintenance, repair, and growth of these structural components. Proteins are composed of amino acids, which are essential for synthesizing collagen (the main protein in connective tissue), actin and myosin (key muscle proteins), and other matrix proteins crucial for bone and tissue integrity.

Numerous clinical studies have demonstrated that adequate protein intake is necessary for muscle mass maintenance, especially in aging populations, athletes, and during recovery from injury. Protein deficiency can lead to muscle wasting, delayed wound healing, and increased risk of bone fractures due to decreased bone matrix quality. Scientific agencies such as the World Health Organization and the Institute of Medicine recommend regular protein consumption as part of a balanced diet to support the body's structural system.

In summary, the use of protein to support the structural system is strongly justified by scientific evidence, with research consistently demonstrating its crucial role in building and maintaining the body's structural framework.