Collagen is an extremely important connective tissue protein in our bodies, making up significant amounts of our skin, tendons, discs and ligaments. Collagen gives structure to these organs, allowing them to heal normally, to have elasticity, to be strong and to hold together well under the stresses of functional life. It also gives our major blood vessels and other organs the strength they need to remain working correctly. People vary very greatly in the suppleness of their joints and skin and show the whole range from very stiff jointed to very mobile or “double jointed”.