Health · Medical Research · 1 hr ago
High ultra-processed food intake linked to signs of brain damage
Researchers in Canada studied 8,783 adults aged 35 to 69 who had no history of heart disease.
They compared participants’ food surveys with brain scans and grouped them by how much ultra-processed food they ate.
The highest-intake group was about 40% more likely to show brain damage than the lowest-intake group, including signs of small strokes or changes in the brain’s wiring.
The participants with the highest intake also had more body fat, but memory and thinking test scores did not differ significantly between the groups.
The findings show a link, not proof that ultra-processed food caused the brain changes, because researchers measured diet and health at one point in time.
Long-term studies are needed to find out whether these changes lead to later problems such as stroke or cognitive decline.
A study of 8,783 Canadian adults found that those who ate the most ultra-processed foods were more likely to have signs of silent vascular brain injury than those who ate the least.
The highest-intake group was about 40% more likely to show the injury, which included silent strokes or damaged areas in the brain’s white matter.
The study found no significant link between ultra-processed food intake and scores on tests of memory, attention and thinking.
The highest-intake group also had more body fat and visceral fat, but the researchers said these factors did not fully explain the association.
Because the researchers measured diet and health at one point in time, the study cannot show that ultra-processed foods caused the brain changes.
- Who
- Researchers led by Russell de Souza and Sonia Anand studied 8,783 Canadian adults aged 35 to 69.
- What
- The study linked higher ultra-processed food intake with a greater likelihood of signs of vascular brain injury. It found no significant association with cognitive test results.
- When
- The study was published on October 15, 2026, according to Earth.com, CTV News and CBC; Yonhap reported it on October 16, 2026.
- Where
- Canada.
- Why
- The researchers examined whether ultra-processed food intake was associated with brain injury and cognitive function in middle-aged adults.
This story does not have two clearly opposing sides.
Earth.com, CTV News and CBC published reports on the study.
Yonhap reported the study and its findings.
- Participants
- 8,783 Canadian adults aged 35 to 69
- Brain injury likelihood
- About 40% higher in the highest-intake group than the lowest-intake group
- Injury prevalence
- 11.3% in the highest-intake quarter; 8.1% in the lowest-intake quarter
- Body fat
- The highest-intake group had about 1.7 percentage points more body fat
- Visceral fat
- The highest-intake group had an average of 5.7 milliliters more visceral fat
- Study design
- Cross-sectional; it cannot establish cause and effect
4 sources
[건강포커스] "초가공식품 많이 먹는 중년, 무증상 뇌혈관 손상 징후 많아"
Ultra-processed foods may affect the brain long before symptoms appear
Canadians who eat ultra-processed foods at risk of developing brain damage and dementia: study
We know junk food isn't healthy, but scientists are trying to determine if it's also bad for our brains
What people are saying
I would not have expected this finding, frankly. We studied middle-aged Canadians who had no heart problems and reported no other health concerns.
Our findings suggest that the link between diet and brain health may be detectable before people experience noticeable problems with memory or thinking.