Assure Guard Equine Digestive Aid - 3.53 lb **TO ORDER PLEASE CALL ARENUS ANIMAL HEALTH AT 1-866-791-3344 OR VISIT ARENUS.COM** Assure Guard is designed to help horses during lifestyle challenges like competition, training, transport, and feed changes Calcium carbonate to help maintain proper stomach pH Contains exclusive MINTREX- chelated zinc to support intestinal cell health integrity and nutrient absorption Don't take chances with other products that might work, be sure with Assure