Overview
- A Neurology paper published this week showed people whose mothers and infants had lower sugar exposure had about a 21–23% lower risk of dementia and an average 2.6-year later onset of the illness.
- Researchers used Britain’s World War II–era sugar rationing as a natural experiment and analysed health records from 64,737 UK Biobank participants born around the rationing period to compare early-life exposure groups.
- Brain MRI scans in a subgroup found more grey matter and fewer bright spots in white matter for those with lower early sugar exposure, patterns that researchers say are consistent with healthier brain aging and less small-vessel damage.
- Study authors and independent experts stress this is observational research that does not prove cause and point to key limits including possible cohort differences, the lack of continuous follow-up from birth, and that participants are not yet at peak dementia age.
- If the link is confirmed, public-health steps could include clearer limits on added sugar in pregnancy and infant foods and better labeling of hidden sugars in baby products and drinks to reduce long-term risk.