Biohacker Bryan Johnson has revealed that he is storing his girlfriend Kate Tolo's menstrual blood in a laboratory freezer kept at −80°C, saying the samples will be used to investigate biomarkers linked to women's health and ageing.
Johnson, the 48-year-old entrepreneur behind the anti-ageing initiative Blueprint, shared the detail in a post on X on Thursday, describing menstrual blood as an 'underutilised' biological resource that could provide valuable health information.
