In October, a Mainichi Shimbun reporter asked Perplexity AI in Japanese, "How are the iPS cells discovered by Shinya Yamanaka being used in rejuvenation technology developed by the U.S. startup Turn Biotechnologies Inc.? Please explain in detail." To this, Perplexity's service provided a 742-character response, including answers such as "using genes known as 'Yamanaka factors,' cell rejuvenation technology to reprogram somatic cells is applied, effectively turning back the 'cellular clock.'" The Mainichi Shimbun had published a paid article in April 2024 on its news site about the commercialization of iPS cells researched by Kyoto University professor Yamanaka. Perplexity's response closely matched the free-to-view portion of the article, which was 919 characters long, using identical phrases including "reprogramming somatic cells" and "turning back the cellular clock."