Purina PRO PLAN Adult Original Renal Plus is a complete food scientifically formulated for adult cats. It contains all the nutrients your cat needs for their daily vitality and long-term health. It includes OPTIRENAL®, a combination of protective nutrients that help promote healthy kidneys. This formula has been developed to help support your cat's overall health. It combines essential nutrients including vitamins A, C and E for a strong immune system and for healthy skin and coat. The recipe also has high levels of protein to support strong muscles and a healthy weight, as well as crunchy kibble that is proven to protect teeth from plaque and tartar build-up.