Professor Luigi Fontana, MD, PhD is a highly skilled physician scientist who is recognised as the leading world expert on longevity. Professor Fontana recently was invited to join the University of Sydney as the Leonard Ullmann Chair of Translational Metabolic Health and Director of the Healthy Longevity Research and Clinical Program at the Charles Perkins Centre. He was for many years Professor of Medicine at Washington University, one of the four most highly regarded medical universities in the USA. Credited with conducting the foundational research that gave rise to the 5:2 diet, Professor Fontana’s revolutionary work is leading the world on longevity and the factors involved in living a long and healthy life.