 The most important shortcomings of this study were the hypocaloric interventions in both groups diabetes-adapted diet: 1500kcald vs. oatmeal 1200kcald making it difficult to attribute the observed effects to oatmeal alone as well as the uncontrolled nature. These design flaws have been addressed within this new clinical trial. The investigators plan an open label, cross-over study with isocaloric interventions oatmeal and diabetes-adapted diet: 1200kcald. The intervention comprises two days of oatmeal third and fourth day within a 5 day hospital stay. The control is only treated with 5 days of diabetes adapted diet. Thereafter, the patients are followed every four weeks for an overall of 16 weeks. 