The feline bladder is lined by the glycosaminoglycan (GAG) layer, which helps to maintain the integrity of the bladder lining by stopping microorganisms & crystals adhering to the bladder wall. Each Cystease S capsule contains 125mg N-acetylglucosamine, which is a building block for the GAG layer. Supplementation helps to maintain the integrity of the cat`s bladder lining.