Test Your Knowledge: All Things Nutrition!Share:FacebookPinterestTwitterMailGERD is caused by _____ (a condition related to stomach acid).32%Next Correct Incorrect GERD stands for gastroesophageal reflux disease, which is caused by stomach contents backing up into the esophagus. GERD is caused by _____ (a condition related to stomach acid). Relaxation of the sphincter The reflux of stomach contents into the esophagus An esophagus infection Tension of the pyloric sphincter 32%