How Ultra-Processed Foods Affect Cognitive Performance
A study conducted by researchers from Monash University, the University of São Paulo, and Deakin University has revealed that increasing the share of ultra-processed foods in the diet by just 10% leads to declines in attention and information processing speed. This effect holds true even for individuals who otherwise follow a healthy eating pattern. The findings were published in the scientific journal Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring.
The analysis drew on data from over 2,100 middle-aged and older Australian adults with no signs of dementia. On average, participants obtained about 41% of their daily calories from heavily processed foods. A 10% increase in consumption of items like sugary sodas, packaged salty snacks, and ready-made convenience meals is equivalent to adding one standard 40–50 gram bag of potato chips to the daily diet.
“Just a 10% rise in intake of such foods equals adding only one typical 40 to 50 gram bag of chips per day”
Dr. Barbara Cardoso
Although the study identified a decline in cognitive abilities, it found no direct link to impairments in long-term memory. Notably, the negative impact of ultra-processed foods on cognition occurred independently of overall diet quality, including adherence to the Mediterranean diet. Among the dementia risk factors that ultra-processed food consumption can exacerbate are:
- obesity
- high blood pressure
These results highlight the need for mindful eating habits, as even a small increase in ultra-processed food intake can have detrimental effects on brain function. This research could serve as a foundation for further studies on nutrition and its impact on brain health—an especially pressing issue given the rising prevalence of dementia-related conditions. Raising awareness of these findings may help shape public health recommendations aimed at improving overall population well-being.
As the research emphasizes the impact of ultra-processed foods on cognitive abilities, it is essential to consider how dietary quality plays a role in brain health. A recent study has suggested that a poor-quality plant-based diet may also increase the risk of dementia, raising further questions about the intricacies of nutrition and its effects on cognitive function.