Kidneys role is to filter waste and toxins from the blood, and maintain the normal balance of fluid and minerals within the body. As pets are getting older, damage to kidney tissues may occur. This process is irreversible, and will lead to further loss of kidney function. Renal Cats may also experience loss of appetite and their caloric intake might decline, which may lead eventually to loss of muscle mass. Hill's nutritionists and veterinarians developed Prescription Diet® k/d®, clinical nutrition to support your cat's kidney function and help sustain muscle mass. In fact, the nutrition of k/d is clinically tested nutrition to improve & lengthen quality of life. -Protects vital kidney & heart function -Supports your cat's natural ability to build lean muscle daily INGREDIENTS: Water, Pork Liver, Carrots, Tuna, Chicken, Spinach, Rice, Chicken Fat, Rice Starch, Natural Flavor, Pea Protein, Powdered Cellulose, Fish Oil, Potassium Alginate, Coconut Oil, Egg Whites, Potassium Citrate, Calcium Lactate, Calcium Gluconate, Betaine, Guar Gum, vitamins (Vitamin E Supplement, Thiamine Mononitrate, L-Ascorbyl-2-Polyphosphate (source of Vitamin C), Niacin Supplement, Pyridoxine Hydrochloride, Calcium Pantothenate, Vitamin B12 Supplement, Menadione Sodium Bisulfite Complex (source of Vitamin K), Riboflavin Supplement, Biotin, Folic Acid), Whole Grain Oats, L-Threonine, L-Arginine, Choline Chloride, Taurine, Fructooligosaccharides (FOS), Calcium Chloride, Dicalcium Phosphate, Sodium Tripolyphosphate, L-Carnitine, minerals (Zinc Oxide, Ferrous Sulfate, Manganese Sulfate, Copper Sulfate, Calcium Iodate), Calcium Carbonate. 78 kcal / 2.9 oz (82 g) can Nutrient Dry Matter% Protein 29.4 % Fat 24.4 % Carbohydrate / NFE 37.5 % Crude Fiber 3.4 % Calcium 0.77 % Phosphorus 0.52 % Potassium 1.17 % Sodium 0.25 % Magnesium 0.062 % Taurine 0.5 % Vitamin C 143 ppm Vitamin E 1001 IU/kg Total Omega-3 FA 1.18 % Carnitine 550.2 ppm *The nutrient in the product after moisture is removed. It is used to make direct comparisons of nutrient profiles with differing moisture contents.