Glucosamine Chondroitin With Msm Capsules - Doctor's Best

What is the best Doctor's glucosamine / chondroitin / MSM that includes OptiMSM®? Doctor's Best Glucosamine / Chondroitin / MSM with OptiMSM® is compatible with the structure, function and comfort of the joint.  It is a potent combination of three clinically proven purified ingredients that help the body manufacture proteoglycans in healthy joints.  Proteoglycans contribute to the maintenance of the solid structure of the joint, ultimately improving the healthy function of the joint. Glucosamine sulfate is extracted from chitin, a long-chain polymer consisting of many glucosamine molecules linked together.  Chitin forms structural structures in many living things, including aquatic crustaceans.  Doctor's Best's glucosamine is purified and then sulfated and stabilized with potassium chloride.  It is processed to remove protein residues and impurities, producing pure glucosamine sulfate as the final material.  Chondroitin sulfate is a chemical in the cartilage surrounding the joints of