Dr. Diana Kessler studied dentistry at the University of Heidelberg in Germany and has worked as a dentist in private practice since 1991, Dr. Kessler has seen patients at the diabetes outpatient clinic at the St. Josef Hospital in Heidelberg since 2012, and has lectured on the topic of oral and general health, and on the role of the oral microbiome in chronic disease. She is the author of the book, Gesund durch den Mund