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Cartilage is one of the primary connective tissues of the body, providing flexibility and support to bone joints. Undenatured Type II Collagen is the principal structural protein in cartilage that is responsible for its tensile strength and toughness. Derived from chicken sternum cartilage, UC-II consists of Undenatured (native) Type II Collagen that works with the immune system to support healthy joints and promote joint mobility and flexibility. UC-II's patent protected composition has demonstrated its efficacy in human clinical studies. NOW UC-II is enhanced with Aquamin Red Algae Minerals, a natural source of calcium and over 70 trace minerals.