For the Nutritional Management of Cats with Liver Disorders. Your cat's liver is its largest internal organ and is responsible for ridding the body of toxins and many other functions. Prescription Diet® l/d® Feline cat food was created by veterinarians specifically for the nutritional management of cats with liver disorders that cause reduced liver function. It is highly digestible, with high quality protein sources that reduce the liver workload and aid in the regeneration of liver tissue. Added antioxidant nutrients like Vitamin E, Vitamin C, and selenium help combat oxidative stress. It is also ideally formulated to deal with cats with fatty liver disease (Hepatic Lipidosis). The nutritional formulation of Prescription Diet l/d may also be useful for pets with a variety of conditions.