A new study reveals that the brain’s ability to process and retain information may decline more sharply with age than previously understood, challenging long-held assumptions about cognitive aging. Researchers found that even in healthy individuals, subtle but measurable changes in neural efficiency occur earlier than expected, particularly in regions critical for memory and decision-making. The findings suggest that lifestyle interventions could play a more significant role in mitigating decline than once believed, though the exact mechanisms remain under investigation. Experts caution that further work is needed to distinguish between normal aging and early signs of neurodegenerative conditions.