The dangerous illusion of fully measurable health

Bryan Johnson embodies an age governed by technology, where only that which can be quantified counts. A certain conception of health, compatible with this ethic of numbers, has become the central value. Even to the exclusion of other components of well-being.

Every day at five o'clock in the morning, Bryan Johnson gets up and swallows around sixty pills. Not out of medical necessity: he's in excellent health. But precisely because it's not enough. With a career in the technology sector that has amassed him a fortune of several hundred million dollars, this forty-something devotes most of his resources to «Blueprint», a project whose aim is to slow down, or even reverse, the aging of his body.

Every night is analyzed and every meal weighed down to the gram. Light, air, posture, microbiome... e