Vetri-Disc contains bovine tracheal cartilage (200 mg), a source of Chondroitin -4- and -6- sulfates (glycosaminoglycans)-found in high concentration in the spine and intervertebral discs. This synergistic formula helps to lubricate and support regeneration and healthy functioning of connective tissue in the spine and discs.* Vetri-Disc is recommended as a long term therapy (three weeks to three months for intial results to be seen) because the glycosaminoglycans provided need to build up in the system in order to work properly.