Taking a multivitamin-a-day could slow biological ageing

An international study finds older adults on multivitamins show smaller changes to their DNA-based epigenetic clock.

It shows after two years of daily use, two measures of ageing were slowed in a tiny way.

Massey University nutrition researcher Lisa Te Morenga says it's not a magic pill, and people should still eat well and keep up healthy practices.

She says people probably won't notice the effects, and it's only changing markers of health risk.