Dr. Rattan is head of the Laboratory of Cellular Ageing, Department of Molecular Biology and Genetics, Aarhus University, Denmark. He is an internationally renowned biogerontologist with more than 30 years of experience in research, teaching, scientific writing and public communication. He is one of the pioneers for the testing and application of hormesis in ageing research and interventions. His research expertise include elucidating the molecular mechanisms of human cellular ageing, with respect to protein synthesis, modifications and turnover. He is the discoverer of the ageing-modulatory effects of kinetin and zeatin, which are now used in several skin care products. He has published more than 250 original research papers and reviews in international journals and books. He has extensive experience and success in compiling and editing/co-editing 15 books for various publishers. He is the founder and current Editor-in-Chief of the journal Biogerontology. He is also the author of popular science books for children in several languages, including English, Punjabi and Danish