Prescription Diet l/d Liver Care is clinical nutrition specially formulated to support liver health and help protect vital liver function in dogs. It's made in the USA with global ingredients you can trust, and was developed by Hill's nutritionists and veterinarians. This food includes clinically proven antioxidants to support a healthy immune system. It's also formulated to promote a urinary environment that reduces the risk of developing struvite and calcium oxalate crystals. Please consult your veterinarian for further information on how Prescription Diet foods can help your dog continue to enjoy a happy and active life.