Professor E. Louise Thomas is a leading authority in body composition research at the University of Westminster’s Research Centre for Optimal Health. With over 30 years of experience, she has been at the forefront of applying MRI to assess body composition across the lifespan. After earning a degree in Biochemistry from Queen Mary and Westfield College, she completed a PhD focused on adipose tissue composition using ¹³C magnetic resonance spectroscopy. She has been instrumental in developing and implementing MR-based techniques for large-scale human studies, which are now regarded as the gold-standard phenotyping in health and disease. A founding contributor to the UK Biobank imaging study, she is internationally recognized for advancing MR-based phenotyping methods. She has authored over 160 peer-reviewed publications, featuring seminal research on population sub-phenotypes.