Artificial sweeteners, prevalent in products like sugar-free snacks and diet sodas, are commonly used by those looking to shed pounds. However, recent research hints at potential long-term effects that could influence not just users, but future generations as well, raising concerns about their biological impact as usage continues to rise.
A study reported in Frontiers in Nutrition by researchers from Chile indicated that mice consuming sucralose or stevia showed alterations in metabolism-related genes which were transmitted to their offspring and even to the grandchildren, despite them not having direct exposure to the sweeteners.
This suggests that sweeteners might be capable of affecting gut bacteria and gene functions across generations of mice. While there’s no direct evidence yet for humans, these findings contribute to a growing body of research probing the actual influences of non-nutritive sweeteners, which many assume have no impact on the body.
“When comparing generations, these effects were generally strongest in the first generation and tended to decrease in the second generation,” noted Francisca Concha Cerme, the primary author from the University of Chile.
The study involved 47 male and female mice divided into three groups: one with plain water, another with water mixed with sucralose, and a third with stevia, reflecting typical human consumption levels. After 16 weeks, despite later generations only receiving plain water, researchers observed changes in gut bacteria and reduced beneficial compounds linked to metabolic health, along with shifts in inflammation and metabolism-related genes.
Interestingly, sucralose appeared to create more potent and enduring effects. In the U.S., around 140 million people regularly consume these non-caloric sweeteners, as outlined in the study. The male offspring from the sucralose group experienced mild issues with glucose regulation, while the impact was less pronounced in females. Comparatively, the effects of stevia were less significant and seemed to fade faster.
Concha Cerme expressed the intention behind the study isn’t to instill fear but to foster further inquiry into these additives’ long-term biological effects.
“We noted subtle changes in glucose regulation and gene activity associated with inflammation and metabolism,” she explained. “Such changes may increase susceptibility to metabolic disorders, especially under circumstances like high-fat diets.”
Despite the rising trend of artificial sweeteners, the rates of obesity and metabolic issues remain steady. This isn’t to say that sweeteners are necessarily at fault; rather, it raises valid questions about their impact on overall health. “It may be wise to consider cutting back on these additives until more is understood about their long-term implications,” she suggested.
Kristen Kuminski, a registered dietitian with a focus on metabolic health, noted that while the study’s results are limited to mice, they resonate with ongoing concerns surrounding artificial sweeteners’ roles in human health. She pointed out that sucralose is likely more effective due to its metabolic pathway compared to stevia, which is plant-derived.
“Reducing sucralose and opting for whole food sweeteners might be a sensible takeaway from this study,” she commented. For those using zero-calorie sweeteners, moderate consumption of stevia might pose fewer risks.
The International Sweeteners Association (ISA), which represents stakeholders in the sweeteners sector, responded that this study does not alter existing safety standards regarding sucralose and stevia. They reaffirmed that both have undergone comprehensive safety evaluations and are approved for consumption within acceptable intake levels. However, they emphasize that the methodology of the study, particularly concerning how changes were passed across generations, remains unclear.
Ultimately, more research is essential to conclusively determine the impact of artificial sweeteners on human health, especially regarding their potential multigenerational effects.
