What is Glucosamine Chondroitin? Glucosamine is a naturally occurring nutrient, and a building block of glycosaminoglycans - a major component of cartilage. Glucosamine Chondroitin is glucosamine sulphate with additional chondroitin, a component of connective tissue It’s rarely found in any natural food sources, which is where our supplement can help. Who is it for? Glucosamine is suitable for anyone who are regularly active and are looking to supplement their efforts.