I'm really curious about why he feels the need to "biohack" his body. I've heard him talk about ingesting (sometimes injecting) various compounds and meticulously tracking results via frequent blood labs.
What is the root of his desire that makes him willing to accept the unknown risks? Is he just trying to extend his life expectancy? Does he otherwise feel unsatisfied in some way? Is he worried about the potential unknown harm from what he could be doing to his body? Why not just turn that focus into eating an incredibly healthy diet?