News summary produced by Claude AI
Research published in Neurology examined the relationship between artificial sweetener consumption and cognitive decline in a large population-based study. The investigation tracked approximately 12,772 adults living in Brazil with an average age of 52 years over approximately eight years, monitoring their intake of seven common low-calorie sweeteners and measuring changes in brain function through standardized cognitive assessments.
Participants were categorized into three groups based on total sweetener consumption, ranging from an average of 20 milligrams per day in the lowest group to 191 milligrams per day in the highest group. Researchers evaluated multiple aspects of cognitive performance, including verbal fluency, working memory, word recall and processing speed, administering these tests at the beginning, midpoint and conclusion of the study. After adjusting for age, sex, blood pressure, cardiovascular disease and other relevant variables, the researchers identified a substantial difference between intake groups. Those consuming the greatest amounts of sweeteners showed a 62% faster decline in overall cognition compared to the lowest consumption group, a difference researchers estimated as equivalent to approximately 1.6 additional years of aging.
The analysis revealed that the association was particularly pronounced in younger participants under 60 years old and was notably stronger among individuals with diabetes. When examining individual sweeteners, six of the seven compounds studied—aspartame, saccharin, acesulfame K, erythritol, sorbitol and xylitol—were linked to faster cognitive decline, while tagatose showed no such association. The researchers emphasized important limitations of their work, including reliance on self-reported dietary information and the observational nature of the study, which established an association rather than a causal relationship between sweetener consumption and cognitive changes.