Artificial sweeteners induce glucose intolerance by altering the gut microbiota.
Level 5 - mechanism / opinion, no new human data
Animal model and mechanistic laboratory study with preliminary human translational experiments
PubMed 25231862 · doi:10.1038/nature13793
What was done
The authors assessed the impact of non-caloric artificial sweeteners (NAS) on glucose tolerance and the intestinal microbiome in mice and healthy humans. They evaluated the effects of antibiotic treatment on NAS-induced metabolic changes and performed fecal microbiota transplants into germ-free mice using stool from NAS-consuming mice or cultures anaerobically incubated with NAS.
What was found
The abstract reports no numerical values, effect sizes, or participant numbers. Qualitatively, NAS consumption induced gut dysbiosis and glucose intolerance. These metabolic effects were abolished by antibiotics and transferred to germ-free mice via fecal transplantation. Similar dysbiosis and glucose intolerance were observed in healthy humans.
Why it matters
This study provides evidence of a biological mechanism whereby artificial sweeteners may alter gut microbial ecology and impair glucose regulation, challenging assumptions about their metabolic neutrality.
Limits
The abstract provides no sample sizes, specific sweetener types, dosages, durations of intervention, or quantitative data. The primary causal mechanisms rely on rodent and in vitro models, and details regarding the human experimental design are omitted.
Cited by
- supports Mice exposed to saccharin developed microbiome-driven disturbances in glycemic response that were transferable to germ-free mice via fecal microbiome transfer.
- supports A preliminary small-scale study found that personalized glycemic responses to saccharin in humans occurred and were transferable to germ-free mice via microbiome transfer.