What is the main function of proteins in the body?

The main function of proteins in the body is indeed related to muscle development. Proteins are essential macromolecules that serve as the building blocks for muscles and tissues. They facilitate growth, repair, and maintenance of muscle fibers, making them critical for both athletic performance and overall physical health.

In addition to their role in muscle development, proteins also perform other important functions. For instance, they are involved in the production of enzymes that facilitate digestion and are necessary for metabolic processes. Moreover, many hormones, which are crucial for regulating various physiological functions, are proteins or peptides. However, the primary association of proteins with muscle development reflects their critical role in building and repairing tissues, which is why this option is highlighted as the main function.