New research suggests that regular consumption of low- and no-calorie sweeteners may accelerate declines in memory and thinking skills, with effects comparable to over a year and a half of cognitive aging.
The study, which tracked thousands of middle-aged adults for nearly a decade, found that individuals with the highest intake of these sweeteners experienced a 62% faster decline in cognitive abilities than those with the lowest consumption. This level of decline is roughly equivalent to 1.6 years of natural cognitive aging.
Researchers specifically identified aspartame, saccharin, and several sugar alcohols as being associated with negative impacts on verbal fluency, memory, and overall cognitive function. The effects were most pronounced in participants under the age of 60.
“While these sweeteners are often marketed as healthier alternatives to sugar, our findings indicate they may pose risks to brain health over the long term,” stated the study’s lead author.
The investigation involved detailed dietary assessments and cognitive testing of over 12,000 participants with an average age of 52. Results showed consistent patterns of accelerated cognitive decline among high consumers of artificial sweeteners commonly found in diet beverages, flavored waters, low-calorie desserts, and various processed foods.
Industry representatives have questioned the findings, noting that observational studies cannot prove causation and pointing to established safety approvals from health authorities worldwide. They maintain that these sweeteners have undergone rigorous safety evaluation and play a role in sugar reduction efforts.
The research adds to growing scientific scrutiny of artificial sweeteners, which have previously been linked to other health concerns. The study authors suggest consumers consider natural alternatives when seeking to reduce sugar intake.
