Matthew Thomas Keys is a researcher and PhD candidate in Epidemiology at the University of Southern Denmark, where he also serves as a Research Assistant in the Department of Public Health’s section for Epidemiology, Biostatistics, and Biodemography. His academic work focuses on geroscience, the field that investigates how aging drives chronic disease.

Keys has been at the forefront of research examining the potential of repurposed drugs, particularly metformin, for aging-related health outcomes. He has critically assessed influential claims that metformin could extend lifespan or reduce the risk of age-related diseases. His studies have highlighted how biases and methodological limitations in earlier research may have led to overly optimistic conclusions.