Actor Ashton Kutcher has a rare autoimmune condition called vasculitis, which is characterized by inflammation of the blood vessels that can be life-threatening. In a 2022 episode of National Geographics “Running Wild with Bear Grylls: The Challenge,” Kutcher said that he had a "super rare form of vasculitis" that knocked out his vision, hearing, and equilibrium. It took him about a year to recover, and he felt "lucky to be alive". Kutcher has gone public with his battle with vasculitis and has shared an encouraging update about his recovery, saying that hes now well enough to run in the New York City Marathon. In a recent interview, Kutcher revealed that he faced the life-threatening illness back in November 2019, and he didnt want to hide it. He wanted to be an inspiration for others.