Longevity enthusiast Bryan Johnson has declared the unimaginable – achieving biological immortality by 2039. He also claimed that his biological age has not changed and that it is tha same as that of last year. 

‘I remain the same biological age’

“I’m going to try and achieve immortality by 2039. One year of time passes, and I remain the same biological age,” he wrote in a post on X (formerly Twitter). 

He added, “The search for the fountain of youth is the oldest story ever told. It’s been the dream of dreamers for millennia, but always painfully out of reach. For the first time in the history of life on earth, in just the past 24 months, the window has opened for a conscious being to realistically strive for this goal. It is an absolutely insane moment.”

ALSO READ

While Johnson acknowledged that science has not yet solved immortality, he argued that there is progress with experimental therapies in place, though they remain flawed and sometimes dangerous. Some interventions, he noted, still carry serious risks, including cancer, and require a fix before they can be safely deployed at scale.

“But we know immortality is possible because nature has already solved it. This isn’t a physics problem like trying to travel faster than the speed of light; it’s a biological engineering problem that evolution has cracked multiple times,” he added. 

‘Immortality by 2039’

Johnson maintains that immortality is not a theoretical impossibility. “2039 is a reasonable target because of the accelerated, AI-driven rate of innovation. AI is morphing from assistant to scientist.  It is powering current researchers with previously unimagined capabilities to enhance discovery and development. That, coupled with enhanced biomarker measurement, creates a closed-loop system of improvement that will speed things up dramatically.”

ALSO READ

His confidence in achieving the impossible stems from his personal experience. He says he has spent the past six years rigorously applying the scientific method to his own body. The improvements, he said, are “stunning”. 

“I started as a worn-down, inflamed, aged 42-year-old who’d broken himself on the rocks of American food slop and entrepreneurship martyrdom. Six years later, my body largely operates at elite 18-year-old levels. That includes my cardiovascular system, fertility, strength, and hormones,” he said. 

However, he acknowledged that all is not well. Johnson admitted to hearing loss, though mild, in the left ear. “I have mild to moderate hearing loss in my left ear that we can’t fix, and my brain is anatomically age 42 (I’m 48).”

But how did he achieve this?

Well, per his own admission, he and his team followed the “scientific method”, measured the biological age of every organ, among other things, to reduce his biological age to that of an 18-year-old. He revealed that he is now growing thousands of clones of his own organs in laboratory dishes. “This will allow me to test drugs and other molecules against my biology to accelerate learning and save my body from potential mishaps.”

He acknowledged making mistakes but expressed confidence that humanity is approaching what he called the “ultimate achievement”, which is immortality. “I personally love the idea of having a child-like mind, 18-year-old physical vibrancy, and a lifetime of wisdom.”

Johnson also framed the initiative as inseparable from the rise of artificial intelligence. He suggested that aligning humanity around life-preserving goals could improve the odds of safely navigating the emergence of superintelligence.

He called human beings a “suicidal species” who, he said, do all kinds of primitive things. “We unnecessarily kill ourselves with what we eat and how we live our lives. Companies make profits from killing other people with their products. We trash the only home we have. We celebrate these things as virtues. It’s really fucked up and backwards. Soon enough, we’ll realise just how infantile we are right now,” he said before stressing, “The 2039 goal points us in the right direction. To say yes to life and no to death. Defiance even.”