NHS Heartburn treatment diet Is sugar toxic in any amounteven in natural sweeteners? Are artificial sweeteners safe? What about stevia and xylitol? Cut through the confusion and hype and find out which sweeteners are safe for you and your family. The LES acts like a one-way valve, allowing food to pass through into the stomach. Its currently thought that these bugs dont t really help us or hurt us, depending on the circumstances. Most people tolerate PPIs well, and side effects are uncommon. Heartburn treatment diet . And yet, we arent totally sure how its spread. pylori .