Mathias Ziegler is a Professor in the Department of Biomedicine at the University of Bergen, specializing in NAD metabolism and its role in cellular function and ageing. His research explores how nicotinamide adenine dinucleotide (NAD) influences energy production, DNA repair, and disease processes, with a particular focus on mitochondrial NAD reservoirs. Ziegler's work has contributed to understanding how NAD depletion impacts ageing and neurodegenerative conditions, paving the way for potential therapeutic strategies.