DONA ® is the original Crystalline Glucosamine Sulfate, which was first developed and marketed for human use by Rotta Research Laboratorium. Crystalline Glucosamine Sulfate is the derivative of the naturally occurring amino-sugar Glucosamine and is a chemically well defined and pure substance. This compound has been thoroughly studied and shown effective to promote cartilage metabolism†, protect joint structure† and support joint mobility†. Although sold as a dietary supplement in the United States, Glucosamine Sulfate is subject to regulation as a drug throughout much of Europe. |