Bryan Johnson’s girlfriend is turning her body into a $2.6 million science experiment

Health & FitnessLifestyle
30 Jul 2026 • 9:21 PM MYT
The Independent
The Independent

The world’s most free-thinking newspaper

Bryan Johnson’s girlfriend is turning her body into a $2.6 million science experiment

  • Biohacker Bryan Johnson's girlfriend, Kate Tolo, has turned her body into a 24/7 science experiment, following a grueling daily routine to create what the couple says will be the most detailed data set ever collected on the female menstrual cycle.
  • Tolo's minute-by-minute schedule involves more than 100 daily tasks, 50 monitoring devices and an experimental "techno tampon," generating an estimated 14 million data points under the watch of a 12-person medical team.
  • The project, backed by the couple's company Immortals, costs an estimated $2.6 million a year and aims to tackle major gaps in women's health research, which Bryan Johnson says has been overlooked for decades.
  • Johnson says every result—good, bad or unexpected—will be made public, with the goal of giving women unprecedented insight into menstrual health and reproductive disorders.
  • Tolo has also revealed she suffers from endometriosis, polycystic ovary syndrome (PCOS) and adenomyosis, painful conditions that she hopes the ambitious research project will help better understand and eventually treat.

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