Extra Strength Glucosamine Chondroitin, Source Naturals, 120 TabletsSource Naturals Glucosamine Chondroitin, Extra Strength, 120 Tablets, is designed to support joint and connective tissue health. This supplement provides essential building blocks for maintaining healthy joints. Glucosamine, an amino sugar, is a key structural component of glycosaminoglycans, which are large linear molecules that help lubricate joints. The product also includes manganese and vitamin C, which are involved in collagen synthesis.