Kate Tolo

Kate Tolo is an Australian-Bosnian entrepreneur. She is the co-founder and chief marketing officer of Blueprint, Don't Die, and Immortals, co-founded with Bryan Johnson. She conceived the idea of turning Johnson's personal health data into a public science experiment, pitched the concept, and has overseen the marketing strategy that grew Johnson's following to millions across social media.

In 2026, Tolo became the subject of a public study of her own menstrual cycle, which she describes as a Rosetta Stone for the female experience. Funded by Immortals at $2.6 million a year, the protocol tracks about 1,900 biomarkers through 105 daily tasks and 50 devices, with the aim of collecting 14.8 million data points across her cycle. Within 42 days, non-invasive testing identified endometriosis, adenomyosis, and polyendocrine metabolic ovarian syndrome (formerly PCOS), conditions that often take five to ten years to diagnose. Tolo shares the work publicly to translate the lived female experience into numbers so it can be understood and respected, and to push the industry toward better non-invasive diagnostics. "I'm doing this for women," she told WIRED.

Recognized as a viral marketing strategist, she is featured prominently in the Netflix documentary Don't Die: The Man Who Wants to Live Forever, which chronicles the Blueprint project and its global following. She is currently building Immortals, a longevity-focused venture.

Before Blueprint, Tolo worked in fashion — at Proenza Schouler, R13, and The North Face — before joining Johnson's brain-computer interface company Kernel in 2021. She first contacted Johnson in 2016 after reading his work on human-AI co-evolution, and spent years pursuing the opportunity before a position opened.

Born in Mackay, Queensland, Australia, to Bosnian immigrant parents. Her sister, Marianna Tolo, is an Olympic basketball player who won a bronze medal with Australia at the 2024 Paris Olympics. Tolo graduated from the University of Canberra with a Bachelor of Fashion in Apparel Engineering and Design, receiving a Chancellor's Scholarship for Academic Excellence.