The fountain of youth may simply be a healthy diet and reduced stress after all, not a magic pill or expensive cosmetics.

Comprehensive lifestyle changes, including more fruit and vegetables as well as meditation and yoga, were shown to reverse signs of aging at the cellular level for the first time in a study published Sept. 16.

Adopting a diet rich in unprocessed foods combined with moderate exercise and stress management over five years increased the length of telomeres, the ends of chromosomes linked to aging, according to a study of 35 men published in the Lancet medical journal. No previous study has shown the effect of lifestyle changes on telomere length, the authors said.