Bryan Johnson· Author
Five years ago, I decided to become a scientific experiment. + I peed in cups + plucked my hair + ejaculated into containers + spit in tubes + ultrasounds, MRIs, oxygen tests + sequenced my genome + biopsied my skin + took 30,000 images of my bowels + collected my blood daily + measured my erections + scanned my bones + imaged my brain + quantified my lung capacity …if it could be measured, we measured it