Want to live to 100? Four key life-extending habits that most people neglect, top longevity expert reveals

It's not just eating a healthy diet, getting decent sleep and working out. Dr Nieland says there's little-known, key daily habits she wishes more adults would build into their routine - at any age. It's not just eating a healthy diet, getting decent sleep and working out. Dr Nieland says there's little-known, key daily habits she wishes more adults would build into their routine - at any age.