Collagen is the most abundant protein in the human bodyand a key constituent of skin, joints, bones, blood vessels, organs and more. The word “collagen" is derived from kolla, the Greek word for glue. Collagen is literally the substance that binds us together. It forms an extensive netlike framework throughout the inner body and imparts shape and structural strength to virtually every tissue. While bountiful in youth, the collagen content of the body gradually decreases with age, leading to thinner, weaker, less resilient tissues over time.Loss of collagen is one of the most profound consequences of the aging process.