Bryan Johnson says lab-grown cells from his own blood could one day grow replacement organs, test risky therapies before he tries them and even serve as his personal 'blood boy' supply, as the anti-ageing entrepreneur shifts from trying to slow ageing to attempting to rebuild his body after being diagnosed with an incurable autoimmune disease.
Johnson announced the experiment on X this week, describing it as the first practical example of a new medical approach inspired by his diagnosis with autoimmune gastritis, a chronic condition that attacks the stomach lining and currently has no cure.
