India, July 31 -- Tech entrepreneur Bryan Johnson, who has spent millions each year since 2021 on his anti-ageing regimen since selling his payments company Braintree under his ambitious Project Blueprint, has admitted he is beginning to question whether his longevity experiment has gone too far. His candid reflection comes weeks after he revealed he had been diagnosed with autoimmune gastritis, a chronic condition in which the immune system attacks the stomach lining. The remark surprised many, given that the entrepreneur has spent years following an intensive anti-ageing regimen that includes taking hundreds of supplements, maintaining a strict sleep schedule and making quirky lifestyle choices aimed at slowing biological ageing such as...