As we age, the water content of cartilage decreases, causing problems in joint mobility. Chondroitin Sulfate helps to support fluid within cartilage tissue.* Hydration of these tissues helps to maintain the compressibility, elasticity and fluidity of joint movement that are characteristics of healthy joints. Having adequate amounts of fluid in these tissues helps keep cartilage healthy in two ways: it acts as a shock absorber within the joints of the body, thus protecting cartilage from being worn away by the bones; and it carries nutrients to the cartilage. The cartilage in the joints of the human body has no blood vessels, so it must receive its nutrients from tissue fluid.