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Artificial additives
Artificial sweeteners and metabolic health
Emerging evidenceIndependentThe BMJ, 2022
Sample size
102,865
participants
Study duration
9 years
Study type
Prospective cohort
Note on evidence stage
This area is actively debated in the scientific community. Emerging evidence does not mean established harm — it means sufficient rigorous study exists to warrant attention and further research.
Plain English summary
Emerging research challenges the long-held assumption that artificial sweeteners are metabolically neutral. Recent large prospective cohort studies suggest potential associations with metabolic syndrome, though causality is not yet established.
Key findings
- A study of 102,865 participants found aspartame and acesulfame-K associated with increased cardiovascular event risk
- Gut microbiome disruption has been observed in experimental studies using sucralose and saccharin
- The association may be partially explained by reverse causality — unhealthy individuals may preferentially choose diet products
- The WHO issued a conditional recommendation in 2023 against using non-sugar sweeteners for weight control