Bryan Johnson's autoimmune diagnosis tests his Don't Die quest

Bryan Johnson, the Silicon Valley biohacker behind the Don't Die movement, revealed earlier this year that he has autoimmune gastritis—a chronic, incurable inflammation of the stomach. The diagnosis arrived as Johnson, 49, pursues immortality by 2039 through extreme longevity protocols, raising fresh questions about whether even the most measured bodies can outrun autoimmune disease.

Key Takeaways

• Johnson disclosed autoimmune gastritis in 2026; medical experts say they cannot conclusively confirm whether it predates his longevity regimen.
• He now frames curing the condition as proof his Don't Die mission can solve incurable illness.
• University of Sydney public-health researcher Dr Brooke Nickel warns against confusing evidence-based prevention with unproven biohacking claims.
• Johnson and Australian partner Kate Tolo are expanding their measured-health project toward women's health data.
• Johnson jokes about irony and critics who, he says, want to see him fail.

What is autoimmune gastritis—and why does it matter for Bryan Johnson?

Autoimmune gastritis is a chronic inflammatory condition of the stomach with no cure, according to reporting from ABC News. For Johnson—the millionaire poster boy of the biohacking movement—it landed as an unexpected twist in a public life built around extreme anti-aging.

Johnson has spent years on headline-grabbing longevity experiments, from multi-generational blood plasma swaps with his teenage son and father to sharing night-time erection data and, more recently, claiming he had cloned himself. Scientists clarified that procedure involved induced pluripotent stem cells, not human cloning.

When announcing the stomach diagnosis, Johnson laughed: "Points for irony and points for the haters!" He added that "there's a substantial portion of the world that wants me to die."

Did Bryan Johnson's biohacking regimen cause his diagnosis?

Johnson told interviewers it is "highly likely" he developed autoimmune gastritis long before he began his longevity journey. Doctors, however, say that timeline cannot be confirmed conclusively.

That uncertainty matters because Johnson sells a vision in which aging and disease can eventually be engineered away. His Don't Die movement—featured in the Netflix documentary Don't Die: The Man Who Wants to Live Forever—targets immortality by 2039. A chronic autoimmune condition without a cure complicates that narrative without ending his experiment.

"The only way we prove ourselves worthy of this mission is if we both get diagnosed with an incurable disease and we have to solve it," Johnson said, referring to himself and Tolo. His focus has shifted toward finding a cure.

What happens to the Don't Die movement now?

Johnson and Tolo, 30, who co-founded Blueprint, Don't Die, and Immortals, say they remain committed. Tolo—who aims to become "the world's most measured woman"—is collecting millions of data points on her menstrual cycle as the pair turn attention to women's health.

Johnson acknowledges the absurdity of their public persona. "We are ridiculous people. We are absurd," he told ABC. Yet he insists credibility matters: "Trust and credibility is the number one thing we care about."

When asked whether a freak accident might end his quest before disease does, Johnson quipped he will "probably be taken out by a bus or similar"—and gave critics permission to celebrate. Tolo's response was steadier: even if they fail, "it doesn't stop us from trying anyway."

How are experts and critics responding?

Dr Brooke Nickel, a senior research fellow at the University of Sydney's School of Public Health, told ABC that some biohacking trends promote genuine prevention but often lack robust evidence and arrive wrapped in commercial marketing. "We should be careful not to confuse good public health practices with vested interests," she said.

A separate Crisis Magazine essay placed Johnson's "war on death" within broader transhumanist debates, noting his appearance on Ross Douthat's final New York Times podcast. The piece argues materialist longevity efforts miss a deeper understanding of mortality—adding philosophical weight to a story already testing biohacking's boldest promises.

For more on how technology reshapes health and human limits, explore our Future Tech & AI Wonders coverage.