Bryan Johnson and Kate Tolo publicise a female-health measurement protocol

Business Insider’s 14 September 2026 report describes Kate Tolo, Blueprint cofounder and Johnson’s partner, starting a large personal measurement programme after an endometriosis diagnosis. The article says the plan uses about 50 devices and 30 apps to track variables such as pain tolerance, reaction time, grip strength, vaginal wetness, cortisol, oral microbiome, metabolic rate and menstrual-cycle data. The stated aim is to build a detailed biological record across four cycles and inform women’s-health research. The article also says the couple and their medical team planned a two-person sauna test: each would swallow a Bluetooth-connected pill and enter a 200°F sauna while the pills measured internal temperature. No protocol registration, prespecified endpoints, assay validation, control condition, sample-size justification, results, adverse events or peer-reviewed analysis is supplied. The article describes a planned public experiment, not evidence that the protocol treats endometriosis, improves fertility or extends life. Johnson’s involvement also creates a direct commercial and promotional interest because Blueprint and related companies sell health products and protocol access. This record therefore labels the report as an n=2 plan with no outcome evidence, not as a clinical trial.

No single scientific conclusion is reported; the article describes a planned public experiment and says no results are yet available.