Cystaid plus cat capsule is a N-acetyl d-glucosamine based nutritional supplement for the maintenance of feline lower urinary tract function; supports bladder health & helps with Feline idiopathic cystitis (FIC). Benefits: - N-acetyl D-glucosamine which helps renew and maintain the glycosaminoglycan layer that lines and protects the bladder mucosa. - L-theanine is an amino acid found in green tea and has natural soothing properties. - quercetin is a natural antioxidant.