演职人员
导演
Kate Dart
Self / Presenter / Journalist
Michael Mosley
Self / 100+ year old marathon runner
Fauja Singh
Self / Professor, Washington University School of Medicine
Luigi Fontana
Self / Calorie Restrictor on Optimal Nutrition (CRONy)
Joe Cordell
Self / Professor, USC
Valter Longo
Self / Professor of Nutrition, University of Illinois Chicago
Krista A. Varaday
Self / Professor, National Institute on Aging
Mark P. Mattson
Self / Wife / General Practitioner / Consultant
Clare Mosley