Enjoy eating chips and fast food? New study sheds light on how this could increase dementia risks

Study Findings

A 10-year, Canada-wide study of more than 8,700 adults found that people whose diets consisted of nearly half ultra-processed foods were 40% more likely to have vascular lesions visible on brain MRI scans.

Researchers say these lesions indicate brain-tissue damage—sometimes described as a hidden or pre-stroke condition—and may be associated with later dementia. The findings show an association, not proof that ultra-processed foods directly cause the damage.

Senior study author Dr. Sonia Anand said the link remained after accounting for other factors. The report also cited Heart and Stroke Foundation research indicating that nearly half of the food Canadians eat each day is ultra-processed.

Food Choices and Affordability

Co-author Russell De Souza noted that inflation can make whole foods harder to afford. He encouraged cooking at home and buying local foods where possible.

Follow-Up Research

A follow-up study at McMaster University is examining participants again with MRI scans. Results are expected in early 2028.

Presenters and Contributors

• Adrian Ghobrial
• Dr. Sonia Anand
• Professor Russell De Souza