In recent years, Silicon Valley has imagined for us a new way of life – one where almost anyone can be a twenty or thirty-something-year-old with a supernatural glow, toned physique, understated intelligence, and a superabundance of vitality. This is not reality for most people, even for the twenty or thirty-something-year-olds, but medicine and technology originally intended to help people achieve baseline health are increasingly being leveraged to close the gap. This raises the question: wh...