Glyco-Flex I for Cats is made from pure freeze-dried Perna canaliculus (New Zealand Green-Lipped Mussel). Perna contains all major classes of glycosaminoglycans (GAGs) including Chondroitin -4- and -6- Sulfates. GAGs are referred to as the "glue of life" and make up the core of all connective tissue. The Perna in Glyco-Flex I for Cats is also rich in amino acids, naturally chelated minerals, numerous enzymes, vitamins and nucleic acids (RNA and DNA).