This Iams ProActive Health formula has PreBiotics that work inside the digestive tract to promote healthy digestion and strong defenses. Healthy inside. Healthy outside. Iams Digestive Care is a specially formulated diet to support and maintain a healthy digestive system. This vet-recommended blend of highly digestible ingredients improves your cat’s ability to absorb important nutrients and get the most out of her food. Digestive Care’s advanced fiber system, a combination of beet pulp and FOS (which promotes good bacteria for a healthy stomach), reduces stomach upset, provides bulk to move food through the intestinal tract, and reduces hairballs and litter-box odors. It also provides all the vitamins and minerals needed for a healthy immune system, including vitamin-rich fish oil for vibrant skin and coat.