Dr. Udo Rabast serves as Professor at the German Academy of Nutritional Medicine, Germany. He specializes in Internal Medicine-Gastroenterology-Nutritional Medicine. From 1980 till 2008, he was the Senior Physician and Medical Director (1981-1997) at Catholic Clinics Ruhrhalbinsel Essen-Hattingen; Germany. He served as the President of the German Society of Physicians of the Professional Association in Nutritional Medicine (BDEM: Federal Association of German Nutritionists) from 1999-2007 and since 2005, he is the Vice- President of the German Academy of Nutritional Medicine (DAEM: German Academy of Nutritional Medicine). He is the Editor of the online Paper The nutritionist and has more than 300 Scientific Publications, numerous National and International Presentations.