The tech entrepreneur Bryan Johnson has devoted his life to dodging death. The 48-year-old is obsessed with becoming the healthiest person in the world and is on a quixotic quest to reverse his biological age and live forever. As such, Johnson is disciplined about what he eats, takes dozens of supplements a day, and measures every single biomarker possible, boasting that he is “certainly the most biologically measured person ever”.

In short: good luck finding any ice cream in his freezer. But you know what you will find? His girlfriend’s menstrual blood. On Thursday, Johnson, a chronic oversharer, posted a photo of his 30-year-old girlfriend, Kate Tolo, on X with the caption: “Kate’s period blood is in my -80 °C freezer. Around 10 mL.”

This isn’t the first time Johnson has collected a loved one’s bodily fluids: a few years ago he boasted about infusing himself with a liter of his “blood boy’s” plasma. What in God’s name is a blood boy? Oh, that’s just what Johnson calls his son Talmage, who was 17 at the time. Johnson also donated a liter of his own blood to his own father.

This also isn’t the first time Johnson has taken it upon himself to share personal information about his loved ones on the internet. Last year, he posted data comparing his and his teenage son’s nocturnal erection metrics. “Nighttime erection data from my 19-year-old son ... and me,” he wrote on X, tagging Talmage. “His duration is two minutes longer than mine. Raise children to stand tall, be firm, and be upright.”

Once we’ve all taken a moment to recover from that, we can move on to the menstrual blood in the freezer. What is Johnson planning to do with it? Study it, apparently. “Menstrual blood is valuable and underutilized … It’s a non-invasive look into the uterus,” Johnson explained on X. Tolo and Johnson intend to examine the blood for everything from endocrine disruptors to microplastics. “I like that Kate is a science experiment with me,” he added.

OK. But does she like it? Well, she hasn’t said she doesn’t. Rather she replied to his post with a message saying: “Thanks for looking after me bby.”

Tolo hasn’t just given a one-off blood sample. Johnson has said that........

© The Guardian