Kattovit Urinary Low Magnesium cat diet has been developed in accordance with the latest scientific findings. The recipe for Kattovit Urinary Low Magnesium was put together especially for the prevention of urinary stones. low magnesium (less than 20 mg per 100 kcal) p H minus reduces the p H content of cat´s urine to 6.4 Kattovit Urinary Low Magnesium is not suitable for oxalate stones. If in doubt please consult your veterinarian.