U-7 Gastric Aid 1/2 Gallon is a palatable vitamin/herbal blend that helps promote a healthy equine digestive system. U-7 Gastric Aid promotes healthy digestion, and is not just another calcium-magnesium-aluminum acid buffering product. U-7 Gastric Aid is a revolutionary new formula for use with horses that suffer from poor appetite, poor attitude, dull coat or reduced performance. U-7 Gastric Aid contains all natural active ingredients that promote digestive health in your horse.