Epidemiologist Challenges 8-Year Sweetener Study Linking 6 Additives to Cognitive Decline
Updated
Updated · ScienceAlert · Aug 2
Epidemiologist Challenges 8-Year Sweetener Study Linking 6 Additives to Cognitive Decline
1 articles · Updated · ScienceAlert · Aug 2
Summary
Gideon Meyerowitz-Katz said the widely cited paper behind headlines on artificial sweeteners and brain aging does not reliably show harm, despite claims involving six sweeteners.
The 8-year observational study relied on a single food-frequency questionnaire from a Brazilian cohort, measuring what participants said they ate rather than tracking actual intake over time.
He argued the result could reflect reverse causality and selective analysis: one full-cohort model reportedly found no link, while the headline-grabbing result excluded some participants.
Independent reviewers also flagged mathematical errors, and Meyerowitz-Katz said mistakes remained even after a correction, including a confidence-interval problem in the abstract.
The critique adds to a broader debate over artificial sweeteners, which he said are generally well tested and, on current evidence, at least less harmful than sugar.
If a widely publicized study on artificial sweeteners and brain aging was riddled with errors, what else are we getting wrong about diet?
Why did a controversial study claiming artificial sweeteners age the brain ignore the fact that chemically distinct compounds lack a shared biological effect?
Could the very sugar substitutes diabetics use to protect their health actually be accelerating their cognitive decline, or is the science fundamentally flawed?