Bryan Johnson, 48, has spent around $10 million on unusual treatments and therapies in a bid to live forever, but the billionaire biohacker has now been diagnosed with incurable autoimmune gastritis
An eccentric biohacker thinks people can “live to 500” and issued some advice to people who are aiming to live for ages.
Bryan Johnson, 48, has a fixation with living forever and infamously drank his own son’s blood to achieve his goal. The tech guru has pulled a number of other ‘stay young’ stunts including cloning himself as a baby and tweeting about his wife’s vagina.
Earlier this week Johnson wrote on X (formerly Twitter) he reckons the age limit for humans could be 500 years old. “Pace yourself as if you live to 500, because you may,” he wrote.
Johnson recently disclosed that he has developed autoimmune gastritis. It’s an incurable chronic illness where the immune system erroneously attacks healthy cells in the stomach lining.
The diagnosis seems to have prompted him to question whether his relentless pursuit of enhanced health and extended life was worthwhile. Earlier this month, Johnson wrote: “Been thinking things over and wonder if I’ve taken this whole longevity thing too far.”
Johnson has undergone years of bizarre treatments and therapies that have cost him approximately $10 million (£7.5m), all pursued in the name of longevity. The tech mogul regularly undergoes tests to evaluate the speed and health of his sperm, aiming to maintain the fertility levels of a considerably younger man.
He also purports to have eradicated 95% of microplastics from his semen by spending 20 minutes each day in dry saunas while applying an ice pack to his groin area.
He disclosed on X that the concentration of microplastics in his ejaculate dramatically dropped from 165 particles per millilitre in November 2024 to a mere 20 particles per millilitre in July 2025.
“The therapy we think most responsible for this reduction is sauna as it also eliminated most environmental toxins in my body, including those linked to various plastics,” he wrote.
Johnson also used to inject his own son’s teenage blood in the quest for youth, although the exacting father did seem to halt this practice after questioning its benefits.