Prebiotic sodas have rapidly gained popularity as one of the newest beverage trends. Many brands market these fizzy drinks as a healthier alternative to traditional soft drinks, claiming they support gut health while containing fewer calories and less sugar. However, recent research suggests consumers should look beyond the marketing buzz, as the nutritional content inside the can may not always align with the healthy image portrayed on the packaging.
The upcoming presentation at NUTRITION 2026, organized by the American Society for Nutrition, will reveal these findings. Prebiotics are a type of fiber that nourish beneficial bacteria in the gut, which is linked to better digestion, immune function, and overall well-being. Because of these potential benefits, many food and beverage companies have started adding prebiotic fibers to their products and marketing them as gut-healthy options.
Researchers from the University of North Carolina at Chapel Hill analyzed 108 prebiotic sodas launched in the U.S. between 2021 and 2025. They compared these drinks with regular, diet, fruit-flavored soft drinks, and flavored sparkling waters to evaluate differences in calories, sugar, fiber, and sweeteners. On average, a 12-ounce (355 ml) can of prebiotic soda contained roughly 35 calories, 5 grams of sugar, and 5 grams of fiber.
While prebiotic sodas generally had less sugar and fewer calories compared to regular soft drinks and fruit drinks, they still contained more calories and sugar than diet sodas and unflavored sparkling water. An important concern was the marketing language used by many brands. For example, some sodas claimed “no added sugar” but still contained about 10 grams of naturally occurring sugars from fruit juice or other ingredients. Although technically accurate, such statements might mislead consumers into underestimating the actual sugar content.
Another notable finding was that nearly two-thirds of these drinks contained non-nutritive sweeteners like stevia, which reduce calorie content. However, the long-term health effects of these sweeteners are still under scientific debate, so consumers should read the full nutrition labels instead of relying solely on health claims. Regarding fiber, while all prebiotic sodas contained more fiber than other soft drinks, the amounts varied from about 2 to 9 grams per can. Since the U.S. has no minimum fiber requirement for products labeled as “prebiotic,” the term alone doesn’t guarantee that the drink provides a significant amount of fiber.
Researchers strongly advise that prebiotic sodas should not replace naturally fiber-rich foods like vegetables, fruits, legumes, and whole grains, which offer much larger amounts of fiber along with essential vitamins and minerals that beverages can’t provide. The health benefits of prebiotic soda largely depend on what it replaces. For individuals switching from sugary soft drinks, it can reduce sugar and calorie intake. However, for those already choosing water or unsweetened sparkling water, the switch might not offer much additional benefit.
In my opinion, this study offers a valuable reminder that marketing health claims do not always reflect a product’s true nutritional value. While prebiotic sodas may be a better choice than sugary drinks for some people, they should be consumed sparingly and not viewed as primary sources of fiber or gut health support. The best protection for long-term health remains reading nutrition labels carefully and maintaining a well-rounded, healthy diet.
For those interested in nutrition, it’s also worth exploring studies about berries’ potential to prevent cancer, diabetes, and obesity, as well as the risks of vitamin D deficiency. Additionally, recent research on the connection between potatoes and high blood pressure, along with findings that highlight turmeric as a powerful health ingredient, can provide further insights into maintaining optimal health.