Increased Dietary Copper Intake Linked to Enhanced Cognitive Function in Older Adults
Higher dietary copper intake is associated with improved cognitive performance in older adults, with optimal benefits observed at moderate consumption levels. This research highlights copper's potential role in supporting brain health during aging.
Recent research indicates a positive association between higher copper consumption and improved cognitive performance among seniors. The study, published in Scientific Reports, analyzed data from the National Health and Nutrition Examination Survey (NHANES) involving 2,420 individuals aged 60 and above. It found that those with the highest copper intake, averaging at least 1.44 mg per day, scored significantly better on various cognitive assessments, including tests measuring memory, processing speed, and executive function. The evaluations were conducted using instruments such as the Digit Symbol Substitution Test, Animal Fluency Test, and recall protocols.
Copper is an essential trace element involved in crucial brain functions, including energy metabolism, neurotransmitter synthesis, and antioxidative defense. Despite previous studies suggesting both protective and potentially harmful roles of copper in neurodegenerative diseases, this research emphasizes its beneficial impact at moderate dietary levels.
The findings demonstrated that cognitive improvements were most prominent at intake levels up to approximately 1.63 mg/day for certain tests. Beyond this threshold, the association plateaued, indicating no additional cognitive benefits. Interestingly, individuals with a history of stroke showed a stronger correlation, suggesting that copper’s role in neuroprotection could be more significant in vulnerable populations.
Participants with higher copper intake tended to have healthier overall profiles, including higher consumption of zinc, iron, and selenium, and lower smoking rates. The study suggests that maintaining adequate copper intake through diet may be beneficial for cognitive health in aging populations.
While the exact biological mechanisms remain unclear, researchers propose that copper’s involvement in antioxidant processes and neurotransmitter production might underpin its cognitive effects. Further studies are needed to determine optimal levels and understand the long-term impact.
Source: Medical Xpress
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