Resistant Starch, Gut Bacteria and Diabetes

Inclusion Criteria: * Male or female adult persons (≥ 18 years) * Type 2 diabetes mellitus discontinued with lifestyle interventions or insulin therapy or oral antidiabetic therapy (sulphonylureas, glinides, SGLT-2 (sodium/glucose cotransporter 2) inhibitors, glitazone) or a prediabetic metabolism * It is foreseeable that no therapy with metformin or α-glucosidase inhibitors or DPP-4 (Dipeptidyl peptidase-4) inhibitors is initiated during the period of study (8 weeks) * willingness not to systematically change diet and lifestyle habits during the study * Adequate understanding of the German language and sufficient psychological condition to understand the information and instructions associated with the study and to complete questionnaires and assessment scales * Signed informed consent Exclusion Criteria: * Treatment of Type II diabetes mellitus by metformin or α-glucosidase inhibitors or DPP-4 inhibitors * Diminished diabetic metabolic position or medical necessity to convert the therapy in the foreseeable future (HbA1c ≥ 7% or fasting glucose ≥ 152 mg / dl) * Participation in another clinical trial (currently or within the last 30 days) * Incompatibility with the ingredients of the investigational medicinal product * Pregnancy or lactation * Inability to take the test preparation orally * changes in dietary habits and habits within the last 30 days * Antibiotics intake currently or within the last 30 days * Drug abuse in the last six months before the start of the study or ongoing. Alcohol abuse is defined as an average daily of more than 20 g of alcohol in women and more than 30 g of alcohol in men, based on the last six months * A state of health (including abnormal laboratory values) that, at the discretion of the investigator, does not allow study participation, evaluation of study parameters or the use of the investigational medicinal product * Accommodation in a clinic or similar facility, by administrative or judicial order