David Martin is a paediatrician, paediatric endocrinologist and diabetologist. He holds the Gerhard Kienle Chair for Medical Theory, Integrative and Anthroposophic Medicine at Witten/Herdecke University and is adjunct professor of paediatrics at the University of Tübingen. He is involved in the 'Medienfasten' (media fasting) initiative, which is supported by the Medical Section at the Goetheanum.