This Iams ProActive Health formula has PreBiotics that work inside the digestive tract to promote healthy digestion and strong defenses. Healthy inside. Healthy outside. Designed for dogs ages 7+ and up to 50 lbs, Iams Mature Adult contains an exclusive antioxidant blend with Vitamin E and Beta-Carotene to help boost the immune response of your older dog to healthy adult levels. Natural sources of Glucosamine and Iams Daily Dental Careâ¢ reduces tartar buildup by up to 50%.* Protein sourced from chicken and egg helps build strong, firm muscles while seven essential nutrients nourish the heart. A gentle fiber source to support your dogâs ability to absorb and balanced, with no fillers or artificial preservatives. 100% Satisfaction Guaranteed. Learn why Iams is so confident about our quality.