Collagen is a natural structural protein that represents almost 30% of the total body protein of mammals. It is the major component of skeletal and connective tissue and provides structural support. It is found throughout the body – in skin, muscle, tendon and bone. Fibres of collagen are woven together like threads in fabric to form a framework into which new cells can grow. In the skin, collagen provides texture, resiliency, and shape. From the age of 25, your body depletes collagen at 1.5% every year. For instance by the time you reach 45, you will have lost 30% of your body's collagen. Taking 100% Collagen helps to make up for this loss.