The investigation evaluated the intake of seven distinct sugar alternatives commonly found in diet sodas, flavored waters, and packaged low-calorie desserts. Six of these substances correlated with a 62% faster rate of cognitive decline among the highest consumers compared to the lowest. Sorbitol recorded the highest average consumption levels among the tracked participants during the eight-year evaluation. Although these patterns raise critical questions about dietary sweeteners, the authors note that the study identifies an association rather than direct causation.
Key points
High consumption of common sugar substitutes is associated with the equivalent of roughly…: High consumption of common sugar substitutes is associated with the equivalent of roughly 1.6 additional years of brain aging.
Individuals diagnosed with diabetes showed a particularly pronounced vulnerability to cog…: Individuals diagnosed with diabetes showed a particularly pronounced vulnerability to cognitive decline linked to artificial sweetener intake.
Authors emphasized that the current findings establish an observational correlation rathe…: Authors emphasized that the current findings establish an observational correlation rather than definitive proof of direct brain damage.
Sources checked by our analysis pipeline: 1
- Date:
- October 29, 2026
- Source:
- American Academy of Neurology
- Summary:
- A study of nearly 13,000 adults found that people consuming the most artificial sweeteners experienced a 62% faster decline in memory and thinking skills, equivalent to approximately 1.6 additional years of brain aging. Six popular sweeteners were linked to faster cognitive decline, raising concerns about the long-term brain health effects of common sugar substitutes, although causation was not established.
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Sugar substitutes are often promoted as a healthier way to enjoy sweet foods and drinks without consuming as much sugar. However, new research suggests that some of these widely used sweeteners may have an unexpected downside for long-term brain health.
A study published in Neurology, the medical journal of the American Academy of Neurology, found that people who consumed the most low- and no-calorie sweeteners experienced significantly faster declines in memory and thinking skills than those who consumed the least. The association was particularly pronounced among people with diabetes.
Researchers examined seven sweeteners commonly used in foods and beverages: aspartame, saccharin, acesulfame-K, erythritol,…
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