This formula combines three forms of glucosamine: glucosamine HCl, glucosamine sulfate and n-acetyl-d-glucosamine. These naturally occurring substances may build and maintain the matrix of collagen and connective tissue that forms the ground substance of cartilage.* – Cartilage Support: Glucosamine Complex combines three forms of naturally occurring glucosamine substances to help facilitate cartilage support.** – Tissue Support: This convenient formula combines two of the most important cartilage building blocks, glucosamine and chondroitin, with manganese ascorbate for enhanced connective tissue support.** – Collagen Formation: Glucosamine Complex helps to build and maintain the matrix of collagen and connective tissue that forms cartilage.** – Pure Quality: Our supplements are made with only premium ingredients sourced from trusted suppliers and guided by our nutritional experts, then carefully manufactured and tested to verify their potency and purity. – Pure Difference: What makes us different isnt just our process or what goes into our supplements — what we leave out matters, too. Pure Encapsulations products are FREE FROM wheat, eggs, tree nuts & peanuts, gluten, artificial colors, flavors & sweeteners, coatings and shellacs, GMOs, and unnecessary binders, fillers & preservatives.