A unique formulation of bovine tracheal cartilage and manganese with other supporting nutrients for spinal support.* Bovine tracheal cartilage is rich in two types of glycosaminoglycans, Chondroitin -4-and -6- Sulfates. They provide the building blocks for nourishment and support of spinal discs and the surrounding connective tissues of the spine.* Our bovine tracheal cartilage originates in the U.S. Our raw material supplier documents the origin and health of the animals used in manufacturing and certifies our bovine cartilage to be BSE free. Certification also states that there is no co-mingling or mixing of other materials of beef origin during the processing of the cartilage.