Glyco-Flex II contains Perna canaliculus, Glucosamine HCl, Dimethylglycine, Methylsulfonylmethane, and manganese for added joint support. Methylsulfonylmethane also provides added comfort during recovery. It is part of the Vetri-Science stage of life program. STAGE 2, REBUILD, for moderate stages of joint dysfunction. Glyco-Flex II offers a comprehensive support for joints and connective tissue