Settelex™ is designed to soothe the digestive system and help to maintain healthy amounts of acid within the stomach, which in turn helps to maintain normal behaviour. The horse secretes hydrochloric acid (HCl) almost continuously as it is needed to breakdown the continual flow of food that horses ingest with their natural trickle feeding behaviour. When horses eat they produce saliva which contains bicarbonate that buffers the HCl production, keeping the pH of the stomach within correct levels. Trickle feeding helps to maintain healthy pH levels within the stomach due to a regular addition of saliva to the stomach. When horses become stressed (due to competition, travel, extended times in the stable) or are fed a high cereal grain diet, the amount of HCl produced increases and the amount of saliva produced decreases. In these cases, it is particularly important to optimise stomach health.