What vitamin deficiency causes acid reflux? A guide to nutrient absorption and GERD
                                
                                
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                                    4 min read                                
                            
                                While acid reflux, or GERD, affects approximately 20-30% of the US population with weekly symptoms, a common question arises: **What vitamin deficiency causes acid reflux?** The answer is more complex than a direct cause-and-effect relationship; it often involves how treatments for reflux affect the body's ability to absorb essential vitamins and minerals.