Give your horse the confidence to perform with Purina^® Outlast^® Gastric Support Supplement, a unique blend of ingredients designed by our PhD Equine Nutritionists to support gastric balance. Flexible, effective and affordable, Purina research shows Outlast is enjoyed by horses as a topdress or as a snack before a stressful event. When gastric discomfort arises from common activities like stall confinement, transportation, and new environments, Outlast^® provides support for your horse’s gastric health, and gives you and your horse the confidence to perform.