A buffer for the stomach with long lasting buffer compounds. Recommended for pre-riding or any time the horse is under stress. Helps keep the stomach conditions neutralized to prevent the unwanted effects of acid splash resulting in ulceration of the stomach. This is a short-term measure to ensure the stomach is protected. To further aid duration we recommend Gastro-S a slippery elm/psyillium natural mix that provides a gel coating to the stomach (which is long lasting and soothing).