The first the oral purified glucosamine and chondrotin sulfate products (like cosequin) and the second, an injectable form of polysulfated glycosaminoglycan (PSGAG) called Adequan. (2ndchance.info)
Glucosamine is well - regarded as one of the precursor molecules of glycosaminoglycans which are, in turn, very important component of cartilage, the tissue that makes up the joints. (mypetneedsthat.com)
Exposure to common food additive carrageenan leads to reduced sulfatase activity and increase in sulfated glycosaminoglycans in human epithelial cells Check out this book: Excitotoxins: The Taste That Kills (wellnessmama.com)