Your brain can keep improving into your 90s, study finds

A three-year study of nearly 4,000 adults (ages 19-94) found measurable improvements in brain health including thinking clarity, emotional well-being, and sense of purpose through brief daily brain-training activities, challenging the assumption that mental sharpness inevitably declines with age.

This does not prove brain training works universally for all people, nor does it establish optimal duration/type of training or long-term outcomes beyond the study period.