 A long known therapy for the acute treatment of patients with deteriorated glucose metabolism and insulin resistance are carbohydrate days. The principle of the therapy was firstly introduced in 1903 by Carl von Noorden Noorden et al. 1903. The diabetic patients were treated for several days with a carbohydrate rich diet with fat restriction. Surprisingly, this resulted in an amelioration of glucosuria. Today its still a valuable tool for patients with uncontrollable diabetes mellitus and severe insulin resistance Willms B. 1989. But up to now there has been no systemic evaluation of carbohydrate days in patients with deteriorated Diabetes mellitus and insulin resistance. 