Current Opinion in Clinical Nutrition and Metabolic Care was launched in 1998. It is one of a successful series of review journals whose unique format is designed to provide a systematic and critical assessment of the literature as presented in the many primary journals. The fields of clinical nutrition and metabolic care are divided into 15 sections that are reviewed once a year. Each section is assigned a Section Editor, a leading authority in the area, who identifies the most important topics at that time. Here we are pleased to introduce the Section Editors for this issue. SECTION EDITORS George GrimbleGeorge GrimbleGeorge Grimble graduated from University College London (UCL) and the London School of Hygiene and Tropical Medicine, UK. He has pursued a research and teaching career in clinical nutrition since 1980. At various times he has worked at Central Middlesex Hospital, St Mark's Hospital, Roehampton and Reading Universities, and is now in the Institute of Liver and Digestive Health in the UCL Division of Medicine, UK. George has specialised in nutrition related to gastroenterology, intensive care for preterm and adult humans, ageing, and the problems of poverty and food insecurity. He has co-authored 69 refereed papers, 96 reviews, 2 patents, and is coeditor of 6 books. As may be guessed, he has broad interests gained partly through designing, initiating, and running undergraduate and graduate programmes. Two MSc programmes in Clinical and Public Health Nutrition and in Eating Disorders and Clinical Nutrition at UCL were joined by a third BSc Nutrition and Medical Sciences programme in 2017. The important thing seems to be to consider nutrition from simultaneously a clinical and basic scientific perspective; societal issues naturally follow on from this. James RyallJames RyallJames Ryall was awarded his PhD in the field of skeletal muscle physiology in 2006 at The University of Melbourne, Australia. In 2008 he was awarded a CJ Martin Overseas Biomedical Research Fellowship (NH&MRC) and from 2008–2013 he worked with Dr Vittorio Sartorelli at the National Institutes of Health in Bethesda, MD (USA) on trying to understand the links between intrinsic cell metabolism and the process of myogenic lineage commitment in skeletal muscle stem cells. This work was the first to provide the whole transcriptome of quiescent and actively proliferating muscle stem cells and defined a process of metabolic programming. In 2013 Dr Ryall returned to Australia and The University of Melbourne, where he is now a leading scientist within the Centre for Muscle Research (CMR). Dr Ryall's current research lies in better understanding the link between skeletal muscle stem cells and their metabolic environment as they transition from quiescence to proliferating myogenic progenitor. A better understanding of the link between metabolism and cell identity will lead to improvements in stem cell transplantation and regenerative medicine, nuclear reprogramming, transdifferentiation, and stable ex vivo expansion of stem cells. Luc TappyLuc TappyLuc Tappy graduated from Lausanne University Medical School in 1981 and completed his medical and research training at Lausanne University Hospital, Switzerland, and Temple University Hospital, Philadelphia, USA. He is currently Professor of the Department of Physiology at Lausanne University, and Associate Physician in the Division of Endocrinology, Diabetes and Metabolism at Lausanne University Hospital. His main research interests are the regulation of insulin sensitivity by nutrients, the pathogenesis of the insulin resistance syndrome, and the metabolic responses to stress and aggression. Bettina MittendorferBettina MittendorferBettina Mittendorfer graduated from the University of Vienna in Austria with a MSc in Human Nutrition, and from the University of Texas Medical Branch in Galveston, USA, with a PhD in Nutritional Biochemistry. In 1999 she came to Washington University School of Medicine in St. Louis, USA, for a postdoctoral research fellowship. Currently she is Associate Professor of Medicine and Nutritional Sciences and the Director of the Nutrition and Obesity Research Center Clinical Science Research Core Laboratory at Washington University in St. Louis. Her research interests focus on the regulation of muscle protein and lipid metabolism with special emphasis on obesity, aging and sexual dimorphism, which she studies in vivo in human subjects by using stable isotope labelled tracer techniques.