Hill's Prescription Diet M/d Cat Food recommended for diabetes mellitus Recommended for overweight cats For cats with Diabetes:Low in carbohydrate levels to improve insulin response.Added L-carnitine to help increase insulin sensitivity.Increased arginine, an amino acid which helps stimulate insulin secretion in the body.Moderate fibre to help improve blood glucose control for diabetic patients.For overweight cats:Low in carbohydrate to encourage fat burning for energy provision.Added L-carnitine to help burn energy as fat and maintain lean muscle mass during weight loss. High protein preserves lean muscle mass during weight loss. Moderate fibre levels to keep your cat feeling full and reduce hunger.