A large-scale study of nearly 9,000 Canadians has found that middle-aged adults who consume the most ultra-processed foods have a 40% higher chance of showing signs of vascular brain injury on MRI scans. These markers, which include tiny areas of tissue damage and small blood vessel issues, often occur without any obvious symptoms but may signal future health risks.

What kind of damage was found?

Researchers looked for vascular brain injury, a term used to describe two specific MRI findings:

  • Covert brain infarcts: Tiny areas of damaged tissue often referred to as silent strokes.
  • White matter hyperintensities: Bright spots on a scan that indicate damage to the brain's small blood vessels.

While these findings were more common in the high-intake group, the study found no immediate difference in memory or thinking skills among the participants. However, lead author Russell J. de Souza noted that these "MRI findings are considered early warning signs" for potential stroke and cognitive decline later in life.

How much ultra-processed food is too much?

The study analyzed adults aged 35 to 69 who had no history of heart disease. Participants were categorized by how many calories they obtained from ultra-processed items, such as sugary cereals, packaged snacks, and soft drinks.

In the lowest consumption group, ultra-processed foods made up about 16% of daily calories. In the highest group, that number jumped to approximately 45%. The researchers also observed that those with the highest intake tended to have higher levels of body fat and deep abdominal fat.

What does this mean for the future?

Because this was an observational study, it shows an association rather than proving that these foods directly cause brain damage. The link appeared particularly strong in women, who in the highest intake group were nearly twice as likely to show signs of injury compared to those in the lowest group. A follow-up study involving repeat scans is currently underway, with results expected in early 2028.

FAQ

Does this mean I will lose my memory immediately?

No, the study found no immediate differences in memory or thinking test scores among the participants.

Is this study applicable to people in the United States?

While the research was conducted in Canada, the findings are relevant as US adults and children consume high levels of ultra-processed calories.