Glucosamine Sulphate and Chondroitin Sulphate extract are key structural components in cartilage and may play and important role in the maintenance of joint cartilage. Ingredients:One tablet provides Glucosamine sulphate 2KCL 500mg, (equivalent to glucosamine 300mg) Chondroitin sulphate extract(marine cartilage extract) 400mg. Other Ingredients: microcrystalline cellulose, magnesium stearate, silicon dioxide, hydroxypropyl methyl cellulose, titanium dioxide, talc, indigotin.