Stefan Safko is the CEO of a robotics start-up in his early forties. He has a successful professional life, a fulfilling personal one, and, by any traditional metric, is in the top percentile of health. He has no chronic diseases, exercises frequently, and has been a lifelong healthy eater. But like most driven and accomplished people, he’d like to level up.
While Safko isn’t by any means looking to become the next Bryan Johnson, spending $2 million a year on anti-aging…

