Bryan Johnson, a 48-year-old biotech entrepreneur determined to live "multiple lifetimes" with his teenage son, shared the news on social media.

In a lengthy social media post, Johnson revealed how difficult it was to obtain the diagnosis and pledged to try finding a cure for the disease. 'My stomach is eating itself,' he…

Bryan Johnson, the millionaire known for his anti-ageing pursuits, has revealed a battle with autoimmune gastritis, a condition where his immune system attacks his stomach.…