Hydrochloric Acid is the most important fluid your stomach holds to digest food. This acid turns food into a liquid for further digestion in the intestines. The walls of the stomach are protected from the acid by a mucus layer that coats them. Unfortunately, the esophagus does not contain such a layer. There is a valve at the base of the esophagus that stops stomach acid from coming up called the lower esophageal sphincter. When this valve weakens, stomach acid can splash upward into the esophagus. This splashing is called acid reflux. Constant acid reflux can damage the lining of the esophagus causing Gastro Esophageal Reflux Disease (GERD). Over time esophageal ulcers can develop. In extreme cases Barrett's Esophagus can form, which is where the esophagus cells turn into stomach cells. This can cause deadly cancer of the esophagus. Vitamin Depot Online.com now carries Natural Esophaguard, which gives an account of relief from gastric distress.