A new study conducted in mice suggests that consuming artificial sweeteners such as sucralose and stevia may have negative effects on the gut microbiome and gene expression — and that these effects could be passed on to the next generation. The findings have raised fresh questions about the long-term safety of widely used sugar substitutes.
Researchers found that mice exposed to sucralose and stevia showed measurable changes in their gut microbiota and in the expression of certain genes. Notably, some of these changes were observed in the offspring of the exposed mice, even when the offspring themselves had not directly consumed the sweeteners, suggesting a potential transgenerational impact.
The study adds to a growing body of research linking artificial sweeteners to gastrointestinal disturbances and metabolic changes. Previous studies have associated high consumption of non-nutritive sweeteners with alterations in blood sugar regulation and gut health, though findings across human and animal studies have not always been consistent.
Scientists caution that results from mouse studies do not automatically translate to humans, and that further research — including human clinical trials — is needed before any firm conclusions can be drawn about the risks of artificial sweetener consumption for future generations. Regulatory bodies have generally considered approved sweeteners safe at recommended intake levels, but this study underscores the need for continued investigation into their broader biological effects.
