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Home » Bryan Johnson Reveals His Stomach is Eating Itself Due to New Diagnosis
Entertainment & Celebrity Buzz

Bryan Johnson Reveals His Stomach is Eating Itself Due to New Diagnosis

AdminBy AdminJuly 11, 2026No Comments3 Mins Read

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Bryan Johnson has spent years (and a lot of money) building a name for himself as a biohacker.

Human immortality is a worthy goal. Some have questioned his methods of trying to get there.

Now, he has come forward with a new snag.

He has a newly diagnosed autoimmune disorder that is causing his stomach to “eat itself.” There is no cure.

Bryan Johnson in May 2019.
(Photo Credit: Jamie McCarthy/Getty Images for Tribeca Film Festival)

Atrophic gastritis is vastly underdiagnosed

On social media, infamous mega-millionaire Bryan Johnson recently revealed his diagnosis.

He has an autoimmune condition called autoimmune gastritis, or atrophic gastritis, or AIG.

(Separately, he received a diagnosis of autoimmune hypothyroidism when he was 21 years old.)

AIG causes his stomach to essentially eat itself, with intestinal and fibrous tissue replacing gastric glandular cells.

Some with AIG are asymptomatic. Many have digestive issues. And, in some cases, they run a higher risk of certain forms of stomach cancer.

To hear Johnson tell it, he lived for at least 11 years with chronically low ferritin.

Ferritin is a cellular protein that stores iron. He did not, however, have anemia — despite his primarily vegetarian diet, which can make it difficult to get enough iron.

(Yes, many plants contain iron. However, vegetation protein is often not as easily absorbed, which is why iron supplements may be needed to help people keep up.)

Johnson, due to his particular interest in his health and due to his vast wealth (he’s not a billionaire but he’s about a third of the way there), was able to delve into his low ferritin using a colonoscopy, upper endoscopy, and five biopsies of his stomach.

“Two days later, the results of biopsies came in, showing clear signs of early autoimmune gastritis: early atrophy confined to the acid-producing lining, with the rest of the stomach still spared,” he wrote.