Bryan Johnson's girlfriend wants to share her body with the world.

Kate Tolo, the girlfriend of Bryan Johnson, has announced her intention to share her body with the world through a rigorous regimen of health monitoring. Over the coming months, she plans to follow a strict morning routine lasting four hours. Starting at 6:30 a.m., Tolo will undergo a series of tests including spitting into a tube, measuring her temperature, and tracking her heart rate variability. She will weigh herself and use a device to monitor reproductive hormones. Her day will include a 30-minute outdoor walk equipped with a weighted vest, a UV-protective face mask, and a sun hat, followed by another 30 minutes of exercise in her home gym. In the evening, Tolo sleeps with an acrylic device inserted in her vagina to monitor blood flow changes. Some days will require blood tests, hearing and taste assessments, and stool sample analysis. Tolo, who is 30 years old and lives in Los Angeles, stated, “I’m not someone who likes taking care of my health. I’m not someone who likes wellness.” However, she is the girlfriend and business partner of Bryan Johnson, a 48-year-old entrepreneur obsessed with longevity. It’s clear some of his habits have influenced her. Johnson sold his company Braintree to PayPal in 2013 for $800 million. He has spent the last five years relentlessly seeking ways to reverse his biological age to around 18. After a detailed article published by Bloomberg Businessweek in 2023 documented Johnson's diet, tests, and medical procedures, he became the face of a growing movement of men spending millions annually to reverse aging. As his body has undergone dramatic physical changes, he has been scrutinized for his reliance on experimental and unproven treatments. Tolo explained that she does not seek eternal youth. Instead, she believes this is their path to ensuring women are understood and seen in the world. Their homemade experiment, which they are broadcasting on social media, aims to record their biological data throughout her menstrual cycle. Tolo hopes to obtain a reference image of her health, she is young and in the peak of her fertility, yet her periods are marked by intense pain that has troubled her for a long time. Last week, Johnson revealed that Tolo suffers from endometriosis after undergoing several non-invasive experimental tests. Tolo learned she also has the syndrome known as SOP, or Polycystic Ovary Syndrome, and adenomyosis, a condition where the uterine lining grows into the muscular wall of the organ. She plans to try treatments that might alleviate her symptoms. Her hope is that her experience can guide future research and, more broadly, female healthcare. She emphasized that women should be studied and treated differently than men. Jennifer Garrison, a neuroscientist and researcher in women’s health, commented, “Measuring and openly sharing your own data is fine, but what’s concerning is that it could be sold to other women as a way to achieve something for which there is no evidence.” Kayla Barnes-Lentz, a 35-year-old influencer specializing in longevity, praised Tolo’s initiative. She has published her own personalized data for over six years, following a regimen that includes spending at least an hour in a hyperbaric chamber and finishing dinner by 2:30 p.m. “Having more data is incredible,” she said. Tolo and Johnson are experts at capturing public attention and leveraging it for business opportunities. Together, they run the company Immortals, which includes their supplement line and product range called Blueprint, access to prescription medications, and a medical consultation service with concierge support. Immortals finances Tolo’s well-being project, whose annual cost is undisclosed.