The muscles are the active part of the apparatus of locomotion. Their task is to move the body. The muscles comprise 40% of the body's weight. The body has 300 individual muscles in different shapes and sizes.

If one were to slice through a muscle diagonally, he would find that it resembles a telephone cable. Inside is a bundle of smaller cables, and each bundle surrounds still smaller ones. The first and largest bundle is made up of muscle fibers in which there are nerves, blood vessels, and connective tissue. Each fiber is built up from smaller strands called myofibrils, and each myofibril contains interlaced filaments of muscle proteins.

The following Standard Process® supplements are available to support the muscles.