If you’re in your 40s, 50s, or 60s and starting to notice that you’re occasionally forgetting things, misplacing things, sometimes having trouble finding words, or worrying about future memory loss, you’re not alone. Although dementia is not a normal part of ageing, age is still the greatest risk factor for dementia (World Health Organisation [WHO], 2025). But what if an increasingly well-supported protective factor for brain health isn’t found in a prescription pad, but in something much more fundamental: your sense of purpose in life?