Scientists in Germany have found a way to dramatically reverse the molecular age of human cells, transforming blood cells from an 80-year-old person into stem cells with an age signature of less than 20 years.

Researchers at the University Hospital of Bonn and the University of Bonn achieved this remarkable transformation by reprogramming immature red blood cells into neural stem cells, which can eventually develop into brain cells. During the process, molecular markers associated with aging were effectively reset, making the cells more than 60 years younger at the molecular level.

Unlike earlier approaches, the rejuvenation happened gradually, allowing scientists to follow the changes over an extended period.…