Why staying curious past 90 might matter more than any diet

Instead of viewing retirement as the finish line, actor Dick Van Dyke, who turned 100 at the end of 2025, continued acting, dancing and creating. His curiosity remained alive, and he has always stayed socially active — continuing to perform, interact with people and stay involved in work he genuinely enjoys.

Research suggests that having a strong sense of purpose may support healthy ageing. According to the National Institute on Aging, staying socially, mentally and physically engaged contributes to maintaining cognitive function and overall wellbeing as people grow older. Researchers studying families of centenarians have also found that individuals with a stronger sense of purpose often experience lower rates of disability, disease and cognitive decline.

Van Dyke himself has never claimed to possess a miracle secret. Promoting his book ‘100 Rules for Living to 100: An Optimist’s Guide to a Happy Life,’ he credited his outlook rather than his diet: ‘I never wake up in a bad mood.’

Scientists estimate that while genetics certainly influence lifespan, everyday behaviours — including regular movement, nutritious eating, quality sleep, emotional wellbeing, social connections and a positive outlook — play an even larger role in determining how people age.

Image: Wikimedia Commons/by Gage Skidmore