Walk through almost any grocery store or scroll social media for a few minutes, and you’ll probably run into a colorful can promising better gut health.
Brands like Poppi, OLIPOP, and other “functional” sodas have exploded in popularity, positioning themselves as a healthier alternative to traditional soft drinks. They’re marketed as containing prebiotics, probiotics, or both—ingredients that support your gut microbiome and, in some cases, even your mood.
But do these drinks actually live up to the hype?
We asked our GI providers, registered dietitians, and gut-brain specialists to separate marketing claims from scientific evidence.
Maybe a better soda choice—but not a gut health miracle
Most of our GI experts agree on one thing: Swapping a full-sugar soda for one of these low-sugar options is generally a positive change.
“For many people, swapping a sugary drink for a prebiotic soda is a nutritional improvement because it typically reduces added sugar while providing some fiber. That said, it’s important to keep expectations realistic,” says Oshi registered dietitian Adrienne Dowd.
“Just know that the benefit comes from cutting out the sugar, not from the ‘gut magic’ on the label,” says Oshi GI provider Robbie Leinart.
What’s the difference between probiotic and prebiotic sodas?
Although they’re often lumped together, probiotics and prebiotics are not the same thing.
- Probiotics are live microorganisms intended to add beneficial bacteria to your gut.
- Prebiotics are types of fiber that feed the beneficial bacteria already living in your digestive tract.
Many popular “gut health” sodas are actually closer to prebiotic drinks than probiotic supplements.
“[Prebiotic sodas] provide fiber to feed your existing bacteria rather than delivering a fresh army of new ones,” says Leinart.
Do the probiotics or prebiotics in these drinks even survive?
This is where the science gets complicated. Probiotics are living organisms, and they have to go through a lot to get into your digestive tract.
“Most standard probiotics are fragile and die quickly inside an acidic, bubbly can sitting on a warm store shelf,” says Leinart. “The acidic environment inside a fizzy soda can kill off a massive amount of bacteria even before you open it.”
That’s important because probiotic benefits depend on consuming a sufficient amount of live bacteria.
Some manufacturers try to address this by using more resilient strains.
“Look for drinks that use spore-forming bacteria (like Bacillus coagulans), which naturally have a hard shell to survive the can and your stomach acid,” says Leinart.
Still, our GI experts caution that most consumers have no easy way to know how many live organisms are still in a can of soda by the time they actually drink it.
Not all probiotics do the same thing
Even if bacteria survive, there’s another problem. Probiotic benefits are highly strain-specific.
Research showing probiotic benefits for IBS, antibiotic-related diarrhea, or other digestive conditions typically involves specific strains studied at specific doses.
“While medical supplements use the exact, clinically tested strains proven to treat specific symptoms, sodas generally use generic bacteria that may not target your needs,” says Leinart.
If a label just says “contains probiotics,” that doesn’t necessarily tell you whether those bacteria have been studied for any meaningful health outcome.
When evaluating a product, experts suggest looking for the full strain name rather than just the bacterial species. “A good label won’t just say Lactobacillus. It should list the exact strain, which looks like a serial number,” says Leinart.
Can prebiotic sodas help you reach your fiber goals?
This is where gut-friendly sodas may offer some legitimate benefits.
Many prebiotic sodas contain 2–9 grams of fiber per can, often from ingredients like inulin or chicory root fiber. These fibers can feed beneficial gut bacteria and help support the production of short-chain fatty acids that play a role in gut health.
But keep in mind that drinking fiber isn’t the same as eating fiber-rich foods.
“When you eat a piece of fruit, a vegetable, or a bowl of lentils, you get fiber packaged alongside vitamins, minerals, and antioxidants that all work together. A soda only gives you the isolated fiber molecule,” says Leinart.
Whole-food fibers also provide benefits that many drinkable fibers can’t, like:
- Cholesterol control
- Blood sugar regulation
- Regular bowel movement support
“Prebiotic sodas can be a suitable addition to a gut-healthy diet, but they shouldn’t replace fiber from whole foods,” says Dowd.
Why do these drinks cause bloating for some people?
If you’ve ever tried a prebiotic soda and felt more bloated afterward, that’s because some commonly used ingredients in these beverages can trigger digestive symptoms,” says Oshi registered dietitian, Beth Rosen. “Some of the ingredients used to sweeten prebiotic and probiotic soda products can have an unintended consequence, especially for those with IBS. Inulin and chicory root extract - the two low-calorie prebiotic fiber ingredients typically included in prebiotic drinks - are also highly fermentable. This means that while it feeds the microbes, the microbes produce gas during fermentation of those fibers, which can, in turn, fill the gut with gas and stimulate unwanted symptoms. Sorbitol and mannitol—sugar alcohols that are no-calorie sweeteners—are large molecules that our bodies can’t digest. When they make their way into the large intestines, they cause water to be drawn in to create balance, which in turn can lead to looser stools, gas, and urgency.”
Who should be careful with gut health sodas?
These drinks aren’t necessarily a good fit for everyone.
People with the following conditions may be more likely to experience GI discomfort after drinking prebiotic or probiotic sodas:
- Irritable bowel syndrome (IBS)
- FODMAP sensitivities
- Small intestinal bacterial overgrowth (SIBO)
- Chronic bloating
“For patients with active GI symptoms, the added FODMAPs, carbonation, and random strains may do more harm than good,” explains Oshi GI Provider Alex Morgan.
Can gut health sodas replace a probiotic supplement?
Not if you’re trying to treat a specific medical condition. “While popular probiotic sodas like Poppi and OLIPOP are often marketed for wellness, they cannot replace prescribed or evidence-based probiotic supplements,” says Morgan. “These are palatable beverages with unproven therapeutic claims, not evidence-based interventions.”
If you’re treating IBS, recovering from antibiotics, or managing another digestive condition, your GI provider can recommend a targeted probiotic supplement instead.
And if you’re looking to support your microbiome, a varied diet is your best bet. “Plain and simple: Plants. Fruits, vegetables, beans, lentils, nuts, seeds, and whole grains. There are so many foods that are beneficial to our microbiome that are affordable, accessible, and delicious. There is really no need for trendy products,” says Rosen.
Struggling with digestive issues like bloating? Oshi can help. Book your first virtual visit today.
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Your nutrition plays a powerful role in your digestive well-being. But figuring out what to eat can be overwhelming, especially if you’re dealing with chronic or occasional GI symptoms.
Oshi’s registered dietitians have specialized knowledge of all GI symptoms and conditions. They work closely with you to:
✔ Identify foods that help—not hurt—your gut
✔ Develop personalized meal plans that fit your lifestyle
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✔ And so much more!
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