No soda is a health food, but some options are dramatically better than others. A standard 12-ounce can of regular cola packs about 39 grams of added sugar, which nearly maxes out the American Heart Association’s recommended daily limit for women (25 grams) and gets men more than halfway there (36 grams). If you want the fizz and flavor without that sugar load, a few categories of soda stand out as genuinely better choices.
Prebiotic Sodas: The Current Front-Runner
Prebiotic sodas like Olipop and Poppi have become the go-to “healthy soda” option, and the nutrition labels back up at least some of the hype. Both brands contain just 2 to 5 grams of sugar per 12-ounce can, a fraction of what you’d get from a regular Coke or Pepsi. The bigger draw is the fiber. Olipop packs up to 9 grams of dietary fiber per can through a proprietary blend of plant-based prebiotic fibers including cassava root fiber, chicory root inulin, and Jerusalem artichoke inulin. Poppi takes a simpler approach, using agave inulin as its sole prebiotic source, which delivers about 2 grams of fiber per can.
Prebiotics feed the beneficial bacteria already living in your gut, which is a meaningful distinction from probiotics (which introduce new bacteria). Whether the amounts in these sodas are enough to produce real gut health benefits is still being studied, but the fiber content alone is a practical win. Most Americans fall well short of their daily fiber goals, so even a few extra grams from a can of soda you were going to drink anyway counts for something. Between the two major brands, Olipop offers significantly more fiber per serving, making it the stronger choice if gut health is your priority.
Kombucha: A Fermented Alternative
Kombucha isn’t technically soda, but it fills the same craving for a cold, fizzy, flavored drink. It’s made by fermenting sweetened tea with a colony of bacteria and yeast, and the finished product contains live probiotics that support your gut microbiome. These probiotics help reduce gut inflammation, strengthen the gut lining, and support the production of helpful compounds in the intestines. A single batch of kombucha can contain 10 or more types of beneficial microorganisms.
The catch is sugar content, which varies wildly by brand. Some commercial kombuchas contain nearly as much sugar as a regular soda, so checking labels matters. Look for brands with under 8 grams per serving. Also worth knowing: pasteurized kombucha has had its probiotics killed by heat, which defeats the purpose. If you’re drinking it for gut benefits, choose unpasteurized varieties sold in the refrigerated section.
Compared to sugar-sweetened sodas, both prebiotic sodas and kombucha may help prevent spikes in blood sugar, though the evidence is still building.
Zero-Calorie Stevia-Sweetened Sodas
If your main goal is cutting calories and sugar to zero while avoiding artificial sweeteners, stevia-sweetened sodas like Zevia are worth considering. Zevia’s ingredients are simple: water, stevia extract, natural flavors, and in some varieties, citric acid. Unlike some stevia-sweetened products, Zevia doesn’t use bulking agents like erythritol. Stevia is a plant-derived sweetener that doesn’t raise blood sugar levels and contains no calories.
The trade-off is taste. Stevia has a slightly bitter aftertaste that some people notice more than others, and these sodas lack the fiber or probiotics that prebiotic sodas and kombucha offer. They’re essentially flavored sparkling water with a sweetener, which makes them a neutral choice rather than an actively beneficial one. For people managing blood sugar or simply wanting a zero-calorie cola alternative without aspartame, they fill that niche well.
Diet Soda: Where It Actually Stands
Traditional diet sodas sweetened with aspartame, sucralose, or other artificial sweeteners remain controversial. In 2023, the International Agency for Research on Cancer classified aspartame as “possibly carcinogenic to humans,” a Group 2B designation. That sounds alarming, but the same category includes things like aloe vera and pickled vegetables. The WHO’s food safety body reviewed the same evidence and found no reason to change its long-standing acceptable daily intake of 40 mg per kilogram of body weight. For a 150-pound person, that translates to roughly 14 cans of diet soda per day, far more than anyone typically drinks.
A more practical concern comes from a separate WHO guideline, which recommends against using non-sugar sweeteners as a strategy for weight control or reducing the risk of chronic disease. The reasoning: long-term observational studies show no lasting benefit for body weight, and some suggest a potential association with increased risk of type 2 diabetes and cardiovascular disease over time. That doesn’t prove artificial sweeteners cause those problems, but it does undercut the assumption that switching to diet soda is an automatic health upgrade.
Sparkling Water: The Simplest Option
Plain sparkling water is, by a wide margin, the healthiest thing you can drink that still scratches the soda itch. It has no sugar, no sweeteners, no calories, and no additives. Research cited by the American Dental Association found that plain sparkling water affects tooth enamel about the same as regular still water, despite being slightly more acidic. Your teeth essentially treat it the same as tap water.
Flavored sparkling waters are a step up from soda but a step down from plain. Citrus-flavored varieties tend to have higher acid levels that can increase the risk of enamel damage over time. And any sparkling water with added sugar is, nutritionally speaking, just soda with better branding. If you find plain sparkling water too boring, adding a squeeze of fresh fruit or a splash of juice at home gives you flavor control without the sugar load of a commercial product.
How to Pick the Best Option for You
Your “healthiest soda” depends on what you’re optimizing for:
- Gut health: Olipop gives you the most prebiotic fiber per can (up to 9 grams), with only 2 to 5 grams of sugar. Kombucha adds live probiotics but requires label-checking for sugar content.
- Zero sugar and zero calories: Stevia-sweetened sodas like Zevia or plain sparkling water. Neither offers gut health benefits, but neither adds anything harmful.
- Blood sugar management: Both stevia and monk fruit sweeteners have no effect on blood glucose. Prebiotic fiber from Olipop may also help blunt sugar spikes.
- Dental health: Plain, unflavored sparkling water is safest. Citrus flavors increase acidity, and any added sugar raises cavity risk regardless of other ingredients.
If you’re currently drinking one or two regular sodas a day, switching to any of these options is a significant improvement. A single can of regular soda can contain your entire recommended daily sugar allowance. Even an imperfect swap to a prebiotic soda or a diet option cuts that sugar intake dramatically and gives your body less to deal with over time.