Remember the satisfying pop of opening a can? Those carbonated bubbles aren’t just fun; they're carbon dioxide gas. When you swallow that gas, it expands in your stomach, creating pressure.
Imagine your stomach as a balloon that’s already full of acid and spicy food. Now blow more air into it. Something has to give, right? That extra pressure can shove stomach acid right back up into your esophagus, which is exactly where you don’t want it.
So, while the initial sip might feel cool and refreshing, the bubbles are actually pushing the fire upward. Not very helpful, bubbles.
The Acid Cocktail
You probably know soda is acidic—it’s what gives it that tangy zip. Most sodas have a pH level around 2.5 to 3.5. For comparison, that’s nearly as acidic as stomach acid itself.
So, you’re essentially drinking something that is already an acid. Then you’re adding it to a pool of stomach acid. It’s like tossing a cup of hot sauce into a pot of boiling chili: the heat doesn’t go away, it just gets more intense.
And let’s not forget the caffeine. Many sodas contain caffeine, which can relax the valve between your stomach and esophagus—the one that's supposed to keep acid down. When that valve gets lazy, acid can sneak up more easily.
How Much Water And Baking Soda For Heartburn at Stephanie Felder blog
