How do carbonated drinks like seltzer physically contribute to forcing acid back into the esophagus?
Answer
The introduced gas causes bloating and distension, putting upward pressure against the LES
The primary mechanism through which carbonated beverages worsen reflux is physical pressure. The dissolved carbon dioxide gas in drinks like soda or seltzer is released within the digestive tract, leading to gas buildup, bloating, and distension in the stomach. This internal expansion creates increased upward physical pressure within the upper abdomen. This elevated pressure pushes against the lower esophageal sphincter (LES), potentially forcing stomach acid back up into the esophagus, triggering heartburn.
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