Nader Lessan (MBBS, MD) is Consultant Endocrinologist and Lead in Clinical Research at the Imperial College London Diabetes Centre in Abu Dhabi, UAE. He undertook his medical training in the UK but has also spent a decade working in the UAE. He is a Fellow of the Royal College of Physicians.

His research interests are focused on medical aspects of Ramadan (in particular, glucose monitoring for people with diabetes), vitamin D deficiency, biomarkers and predictors of complications in diabetes, the genetics of obesity and the role of adenovirus 36 in obesity and diabetes in the UAE. He has authored numerous research papers and speaks at major conferences around the world.

Dr Lessan is an Honorary Senior Lecturer at Imperial College London and is the founder and programme director for the Imperial Diabetes Educator Training (IDET) course.