Memory, mental aging, cognitive decline can begin as early as age 45
Cognitive decline can begin as early as age 45, warn experts — Research: Timing of onset of cognitive decline: Results from Whitehall II prospective cohort study – The brain’s capacity for memory, reasoning and comprehension skills (cognitive function) can start to deteriorate from age 45. But, previous research suggests that cognitive decline does not begin before the age of 60, but this view is not universally accepted.