Royal Canin Urinary S/O is a complete food for adult cats that helps manage and prevent recurrence of struvite and calcium oxalate urolithiasis and is suitable for cats with lower urinary tract diseases. The food acidifies the urine, which helps dissolve struvite stones and prevent their recurrence. It also contains a reduced level of magnesium, a component of struvite crystals, to help prevent their formation. The food dilutes the urine, ensuring regular flushing of the bladder and decreasing the urinary concentration of struvites and calcium oxalates. It also contains low RSS to create undersaturated urine, an unfavorable environment for struvite and calcium oxalate crystal formation. Your cat's bladder health is supported by glycosaminoglycans, which are essential for preventing bacteria or toxins from causing inflammation or stimulating pain receptors. In idiopathic cystitis, Glycosaminoglycans are decreased. Recommended for cases of: Struvite uroliths: dissolution and management of recurrence, Calcium oxalate uroliths: management of recurrence. Not recommended in case of: Chronic Kidney Disease (CKD), Heart disease (when sodium restriction is sought), Concurrent use of urine-acidifying medication, Growth, gestation/lactation. Key benefits include: Struvite dissolution, Urine dilution, Low RSS, and Low Magnesium. Added vitamins and minerals support overall health.