Study: Very Processed Foods Can Slow Your Brain
Study: Very Processed Foods Can Slow Your Brain
Introduction
A new study shows that eating a lot of very processed foods can make it harder to pay attention and think quickly.
Main Body
Researchers from three universities studied 2,100 Australian adults. The adults did not have dementia. The researchers asked about their food and tested their attention and thinking speed. They found that when people ate 10% more very processed foods, their attention scores went down. For example, eating one more bag of chips each day. Other studies also found similar results. A 2022 study from Harvard said people who ate more processed foods had a 25% higher risk of dementia. Another study from China followed 72,000 older adults for 10 years. It said that replacing 10% of processed foods with fresh foods could lower dementia risk by 19%. A study from Virginia Tech linked processed meats and sugary drinks to worse memory. A 2023 study from Ohio State said the average attention span of US adults is now eight seconds. Dr. Barbara Cardoso is the lead researcher. She said the chemicals in processed foods are probably the reason for the brain problems. Dr. Evita Singh said many things can affect attention. The study did not prove that processed foods cause dementia. But it found links to problems like obesity and high blood pressure. The researchers said more study is needed. Very processed foods make up about 60% of the US diet. Some foods that seem healthy, like granola bars and plant-based meat, are also very processed. The researchers say eating these foods sometimes is not a problem. But eating them every day may slowly hurt your brain over time.
Conclusion
This study adds to the evidence that eating many processed foods is bad for your brain. It is especially bad for attention. We need to learn more about how these foods affect the brain.
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Study Links Ultra-Processed Food to Declines in Attention and Cognitive Speed
Introduction
A new study by researchers from Monash University, the University of São Paulo, and Deakin University has found a clear link between eating more ultra-processed foods and measurable drops in attention and mental processing speed. This effect remained even among participants whose overall diets were considered healthy, which suggests that the level of food processing itself may affect brain function.
Main Body
The study, published in a journal of the Alzheimer’s Association, involved over 2,100 middle-aged Australian adults who did not have dementia at the start. Researchers measured their food intake and gave them cognitive tests focused on attention and processing speed. They found that a 10% increase in the amount of ultra-processed food in a person's diet—about the same as eating one extra packet of chips per day—was linked to a statistically significant drop in attention scores. On average, participants got about 41% of their daily energy from ultra-processed foods. This number is similar to the national average in Australia and reflects trends seen around the world. These results are consistent with earlier research. For example, a 2022 study from Harvard Medical School reported a 25% higher risk of dementia among people who ate more ultra-processed foods. Another study, published in Neurology in 2022, followed over 72,000 Chinese adults aged 55 and older for an average of 10 years. The researchers estimated that replacing 10% of ultra-processed foods with less processed alternatives could reduce dementia risk by 19%. Separate work by Virginia Tech University linked processed meats and sugary drinks to worse memory and thinking in adults. Additionally, a 2023 study from Ohio State University found that the average attention span of U.S. adults is now eight seconds, although experts note that many factors contribute to attention problems. Dr. Barbara Cardoso, the lead author and a biochemist at Monash University, stated that the additives and industrial ingredients common in ultra-processed foods are likely the main cause of the cognitive effects, rather than simply the lack of nutrients found in whole foods. Dr. Evita Singh, a psychiatrist at Ohio State University, commented that many variables can affect focus and attention. The study did not prove that ultra-processed foods directly cause dementia, but it did find links to intermediate risk factors such as obesity and high blood pressure. The researchers emphasized that the biological pathways are still being investigated. Ultra-processed foods make up about 60% of the U.S. diet, according to the study’s authors. Many products often seen as relatively healthy—such as granola bars and plant-based meat alternatives—fall into this category because of their additive content. The authors caution that while eating these foods occasionally is unlikely to cause harm, the long-term effects of regular consumption may slowly damage cognitive function over time.
Conclusion
This research supports a consistent pattern linking ultra-processed food consumption to reduced cognitive performance, especially in attention. Although the exact mechanisms are not yet fully understood, the findings suggest that choosing foods based on how processed they are may have small but significant effects on brain health over the long term.
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Study Links Ultra-Processed Food Consumption to Declines in Attention and Cognitive Processing Speed
Introduction
A new study conducted by researchers from Monash University, the University of São Paulo, and Deakin University has identified a consistent association between increased consumption of ultra-processed foods and measurable reductions in attention and mental processing speed. The effect persisted even among participants whose overall diets were otherwise considered healthy, suggesting that the degree of food processing itself may influence cognitive function.
Main Body
The study, published in a journal of the Alzheimer’s Association, involved more than 2,100 middle-aged Australian adults who were free of dementia at baseline. Researchers measured dietary intake and administered cognitive tests focusing on attention and processing speed. A 10% increase in the proportion of ultra-processed foods in a participant’s diet—roughly equivalent to consuming one additional daily packet of chips—was correlated with a statistically significant decline in attention scores. Participants derived approximately 41% of their daily energy from ultra-processed foods, a figure that closely mirrors national consumption patterns in Australia and reflects broader global trends. These findings align with a growing body of prior research. A 2022 study from Harvard Medical School reported a 25% increased risk of dementia among individuals with higher ultra-processed food intake. Another investigation, published in the journal Neurology in 2022, followed over 72,000 Chinese adults aged 55 and older for an average of 10 years; researchers estimated that replacing 10% of ultra-processed foods with minimally processed alternatives could reduce dementia risk by 19%. Separate work by Virginia Tech University linked consumption of processed meats and sugary drinks to poorer memory and cognitive performance in adults. Additionally, a 2023 study from Ohio State University found that the average attention span of U.S. adults is now eight seconds, though experts note that multiple factors contribute to attentional difficulties. Dr. Barbara Cardoso, the lead author and a biochemist at Monash University, stated that the additives and industrial ingredients common in ultra-processed foods are likely the primary mechanism behind the observed cognitive effects, rather than simply the absence of nutrients found in whole foods. Dr. Evita Singh, a psychiatrist at Ohio State University, commented that many variables can affect focus and attention. The study did not establish a direct causal link between ultra-processed foods and dementia, but it did identify associations with intermediate risk factors such as obesity and hypertension. The researchers emphasized that the biological pathways remain under investigation. Ultra-processed foods constitute approximately 60% of the U.S. diet, according to the study’s authors. Many products commonly perceived as relatively healthy—such as granola bars and plant-based meat alternatives—fall into this category due to their additive content. The study’s authors caution that while occasional consumption is unlikely to cause harm, the cumulative effects of regular intake may gradually erode cognitive function over time.
Conclusion
The research reinforces a consistent pattern linking ultra-processed food consumption to diminished cognitive performance, particularly in the domain of attention. Although the precise mechanisms are not yet fully understood, the findings suggest that dietary choices involving the degree of food processing may have subtle but consequential implications for brain health over the long term.