Nova Scotia Health Authority. Nutrition and Food Services.
Nova Scotia Health Authority
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When you eat, food travels from your mouth to your stomach through a long tube called the esophagus. A muscle called the lower esophageal sphincter (LES) joins the esophagus and the stomach. This muscle opens when you swallow to let food and liquids pass into your stomach and stays closed when you are not eating or drinking. If you have GERD, this muscle opens at times when it should be closed, letting small amounts of food and acid from your stomach move back up into your esophagus. This is ca…