Diet Soda Sweeteners Linked to Accelerated Cognitive Decline

A recent study published in the journal Neurology has found a correlation between high consumption of low- and no-calorie artificial sweeteners and an accelerated rate of cognitive decline. The research, which tracked nearly 13,000 adults in Brazil over approximately eight years, observed a difference of about 1.6 years in brain aging between individuals who consumed the most and least amounts of these sweeteners. The findings indicate that regular intake of sweeteners like aspartame, saccharin, acesulfame potassium, erythritol, sorbitol, and xylitol is associated with a faster decline in global cognition, with particular impacts on memory and verbal fluency. The researchers, led by a team from the University of São Paulo, noted that the highest consumption of these sweeteners was linked to a more rapid decline in cognitive function among participants without diabetes. Among participants with diabetes, higher sweetener intake was associated with a faster decline specifically in memory. The study participants consumed an average of approximately 92 milligrams of artificial sweeteners daily, with some individuals consuming nearly double that amount. For perspective, a 12-ounce can of many popular diet sodas can contain up to 200 milligrams of sweeteners such as aspartame. Previous research has already established links between artificial sweeteners and adverse health outcomes, including an increased risk of type 2 diabetes and cardiovascular events. This new study adds cognitive decline to the list of potential long-term harms associated with regular consumption of these sugar substitutes. However, one of the study's authors emphasized that because the research was observational, it cannot definitively prove that artificial sweeteners are the sole cause of the observed cognitive decline. Further investigation may be needed to establish causality and understand the precise mechanisms by which these sweeteners might affect brain health. The study's methodology involved analyzing dietary intake of artificial sweeteners and correlating it with cognitive test results over an extended period, providing a substantial dataset for analysis. The implications of these findings could influence public health recommendations and consumer choices regarding diet beverages and artificially sweetened products.