| Recruiting | N/A | 200 | Europe | Intermittent fasting, Control diet | University Hospital Tuebingen, German Institute of Human Nutrition, Charite University, Berlin, Germany, University Hospital Carl Gustav Carus, University of Leipzig, Ludwig-Maximilians - University of Munich, University Hospital Heidelberg, University of Luebeck, German Diabetes-Center, Leibniz-Institut in Düsseldorf, German Center for Diabetes Research | PreDiabetes, Diabetes type2, Intermittent Fasting, Insulin Secretion | 12/24 | 03/25 | | |