It helps reduce bloating. If you have bloating + weak esophageal sphincter (or just really bad bloating) you can get reflux as a result. Actually, more accurat

It helps reduce bloating. If you have bloating + weak esophageal sphincter (or just really bad bloating) you can get reflux as a result. Actually, more accurately, gas-x has an enzyme that helps break down oligosaccharides. The mechanism may be more complex than above if your acid reflux is somehow related to microbiome stuff (oligos are favorite food for all kinds of gut bacteria).