New Delhi, July 3 -- Bryan Johnson, the technology entrepreneur and anti-ageing advocate known for spending millions of dollars annually on health optimisation and anti-ageing interventions, has revealed that he has been diagnosed with autoimmune gastritis (AIG), a chronic autoimmune disorder in which the body's immune system attacks the stomach lining.

In a lengthy post shared on X, Johnson described his diagnosis as both a personal and scientific challenge, saying he plans to publicly document his attempts to better understand and potentially treat the condition.

"Bad news #1: I have an autoimmune disease. My stomach is eating itself (sic)," Johnson wrote.

He added: "Bad news #2: 2-5% of people have this, too. Likely more, because it...