Tech entrepreneur Bryan Johnson is storing his girlfriend Kate Tolo's menstrual blood in a freezer as part of a data-tracking project focused on female health.

Tech entrepreneur Bryan Johnson, known for his efforts to reverse his biological age, announced he is storing 10 mL of his girlfriend Kate Tolo's menstrual blood in a -80 °C freezer. Johnson stated the blood is intended for study, specifically to examine it for endocrine disruptors and microplastics. Tolo is participating in a data-tracking protocol involving a 12-person medical team and numerous daily tasks.

Data Tracking and Medical Protocols

Tolo is currently tracking 14 million data points related to her menstrual cycle, a process that includes over 100 daily tasks and the use of more than 50 devices. Her routine involves regular urine samples, a temperature pill, and a device referred to as a "techno tampon" designed to track blood-flow variations. Tolo has stated that she is participating in this research to help improve medical understanding of women's health and to address her own symptoms of polyendocrine metabolic ovarian syndrome.

Commercial and Scientific Context

Johnson and Tolo own a company called Immortals, which sells supplements and is reportedly preparing to launch products for women. While the initiative aims to address the historical under-representation of women in clinical research and the lack of study regarding menstruation, critics have noted the potential for the project to serve as a marketing campaign for their company.