A recent cross-sectional study involving 2,371 Mexican adults aged 50 and older has revealed a nuanced relationship between hair copper concentrations and cognitive function. Utilizing data from the 2018 Mexican Health and Aging Study, researchers assessed cognitive performance through an adapted Cross-Cultural Cognitive Examination and measured hair copper levels via inductively coupled plasma mass spectrometry. The analysis categorized participants into two groups: those with normal copper concentrations (0.05-20.95 µg/g) and those with elevated levels (>21.11 µg/g).

The results indicate a positive association between cognitive scores and normal copper levels, with a standardized beta coefficient of 0.04 (95% CI [0.01, 0.07]), even after adjusting for various sociodemographic, health, and environmental factors. Notably, the study found that socioeconomic status significantly moderates this relationship, suggesting that the cognitive benefits of copper are particularly pronounced among individuals of medium socioeconomic standing.

These findings underscore the importance of maintaining optimal copper levels for cognitive health, particularly in aging populations. The study shifts the paradigm in metal exposure research, highlighting that both deficiency and excess of copper can adversely affect cognition. Future investigations should focus on elucidating the mechanisms behind copper’s effects on cognitive function and further explore how socioeconomic factors influence these outcomes. This could lead to targeted interventions aimed at optimizing copper intake as a potential strategy for enhancing cognitive health and longevity in older adults.

Source: academic.oup.com