Colourful cans, gut-health promises and low-calorie claims have helped prebiotic sodas become one of the hottest new beverage trends. Many shoppers believe these drinks are much healthier than traditional soft drinks.
A new analysis from researchers at the University of North Carolina at Chapel Hill suggests the reality is more complicated. The research will be presented at NUTRITION 2026, the annual meeting of the American Society for Nutrition.
Prebiotic fibres are special carbohydrates that cannot be digested by people but can be used as food by helpful bacteria living in the intestines. Scientists believe these fibres may support digestive health, but the amount needed for meaningful benefits is still being studied.
The researchers examined 108 prebiotic sodas launched in the United States between 2021 and 2025. They compared their nutrition with regular soft drinks, diet soft drinks, fruit drinks and flavoured sparkling water to better understand how healthy these products really are.
Overall, prebiotic sodas occupied the middle ground. They contained fewer calories and less sugar than ordinary soft drinks, but more than diet soft drinks and flavoured sparkling water. An average can contained around 35 calories, 5 grams of sugar and 5 grams of fibre.
Many products also contained sweeteners such as stevia instead of relying only on sugar. While this helps reduce calories, consumers should remember that low calorie does not automatically mean highly nutritious. The complete ingredient list and nutrition panel still matter.
The study highlighted another important issue. Claims such as ‘no added sugar’ may sound healthier than they really are because the drink can still contain a considerable amount of sugar naturally present in fruit juice. These claims may create what researchers describe as a health halo, encouraging people to think a product is healthier than it actually is.
Although all prebiotic sodas contained more fibre than standard soft drinks, the fibre content varied greatly. Since there is no legal minimum amount required to use the term ‘prebiotic’ in the United States, consumers cannot assume every product offers the same digestive benefits.
The researchers stressed that these drinks should not become the main source of dietary fibre. A balanced diet rich in vegetables, fruits, beans and whole grains remains the best way to support gut bacteria and overall health.
Whether a prebiotic soda is a healthy choice depends on individual habits. Replacing sugary soft drinks with a prebiotic soda may reduce sugar intake, but replacing water or unsweetened sparkling water with one may offer little extra benefit while adding calories and sweeteners.
In my assessment, this study offers valuable guidance for consumers rather than criticism of prebiotic sodas. These beverages may be useful as a healthier alternative to regular soda, but they are not miracle health drinks.
People should judge them by their full nutrition profile instead of attractive marketing claims and continue focusing on a healthy overall eating pattern.
If you care about health, please read studies about the best time to take vitamins to prevent heart disease, and vitamin D supplements strongly reduce cancer death.
For more information about nutrition, please see recent studies about plant nutrient that could help reduce high blood pressure, and these antioxidants could help reduce dementia risk.
Source: University of North Carolina at Chapel Hill.
