If young blood can really halt death, things are going to get weird:
It's fitting that the world's oldest surviving work of literature is about a man who wanted to do just that: Live on. The Epic of Gilgamesh follows the eponymous hero, a king and mighty warrior, powerful enough to slay monsters, but nonetheless powerless to change his fate: Time will eventually wear him down, and he will die.
Have you tried: Travelling to South Africa?