Soda has a pH around 2.5 to 3.5, which is almost as acidic as stomach acid. Your stomach is already a super-acidic vat designed to digest tough meat, but when you add extra acid from soda, it can irritate the stomach lining.
This is especially true if you have a sensitive tummy or an empty stomach. Drinking soda on an empty stomach is like pouring a little bit of battery acid onto an already-rusty pipe. It can cause a burning sensation, heartburn, or even a dull ache.
The carbonation also makes the acid more fizzy, which means it splashes upward into your esophagus. That’s the classic “soda burp” that tastes like regret and leaves a burning trail.
Your Gut Bacteria Are Throwing a Party (And It’s Not a Good One)
Your gut is home to trillions of bacteria that help digest food. When you drink soda, you’re basically dumping too much sugar into their neighborhood. They go wild, fermenting it into gas and acids at warp speed. That’s why you get that puffy, crampy feeling—it’s a bacterial rave, and your stomach is the dance floor.
Why Does Soft Drink Hurt My Stomach at Lisa Travis blog
Over time, if you drink soda regularly, these bacteria can change. They might get used to the feast, making you even more sensitive to bubbles and sugar. Ever notice how some people can chug soda like water, while others get a bellyache from half a can? It’s all about your personal microbial squad.
