Rich people do not always live longer than un-rich people.
Eating nutrients-rich food does not always end up longevity.
Living in clean environment does not always guarantee the longevity.
Well-educated people do not always live longer than the illiterate people.
Excising well doe not always results in longevity.
So what can lead to the longevity?
I would say: happiness from self-satisfaction.
If you are never satisfied with what you have, you are often under pressure or stress, causing irreversible changes in your physical body and psychological minds.
So, be simple, be natural, be real, and be happy, then likely live longer!