Chris Hemsworth put his mind and body to the test for the National Geographic and Disney+ docuseries, "Limitless." After thorough genetic testing, Hemsworth discovered he has two copies of the APOE4 gene – one from his mother and one from his father – which studies link to an increased risk of Alzheimer's disease. Adding more severity to the discovery, the National Institute of Health recorded in a 2021 study that one in four people carry a single copy of the gene, but less than 3% of the population have both. Despite the recent release of the trailer for "Extraction 2," rumors have swirled that Hemsworth is "slowing down" on the work front. A source told Page Six that while Chris isn't exactly retiring, "he doesn’t plan to take on many roles because of [learning about his high risk for] Alzheimer's." "Stay healthy Chris! We love you, you’re such a great actor and if it’s true you are taking a break from acting, we support you because your health comes first," one fan wrote on Instagram.