How to live to be 100? A youth pill, reprogramming at the genetic level or a healthy lifestyle?

Collage by Olena Zelenina.

Is it possible to reprogram the body, slow down the aging process and prolong youth? How does stress affect the mechanisms of aging? Is biohacking really an effective tool for longevity? What is the upper limit of the age that can be achieved by a healthy lifestyle?  And what should we do to increase our chances of living to 100?