Ultra-processed foods linked to silent signs of brain damage
A Canadian study published in JAMA Network Open, using brain MRI scans of nearly 9,000 adults aged 35 to 69, found more small silent brain lesions in people who ate more ultra-processed foods.
Source: Ultra-processed food intake linked to silent strokes in healthy middle-aged adults, study finds (phri.ca). Summary written with AI from the source and reviewed by rules; read the original.
What the research shows
Researchers at McMaster University's Population Health Research Institute analyzed diet questionnaires and MRI scans of participants without heart disease. People in the highest-consumption group were 40% more likely to show these lesions, which cause no symptoms but are considered warning signs for stroke and memory problems later on. Among women, the likelihood was nearly double.
Ultra-processed foods made up about 25% of daily servings on average, reaching 45% among the heaviest consumers. In that group, minimally processed foods fell to 41% of servings, against 68% for those who ate the least ultra-processed food.
What it means
The result suggests the link between diet and brain health may show up before any noticeable problem, already between ages 35 and 69.
How to read it with care
Each person was assessed only once, so the study shows an association, not that ultra-processed foods cause the lesions. The authors say follow-up with repeat MRI scans is under way.
This article explains research and does not replace a consultation. Anyone thinking about changing exercise, diet, supplements or treatment should talk to a doctor or another qualified health professional.