The Effect of GIP, GLP-1 and GLP-2 in Individuals With Genetically Altered Receptor Function

Inclusion Criteria: * BMI 19-35 kg/m2 Exclusion Criteria: * Treatment with medication or supplements that can not be discontinued for 12 hours * \>10 objects of alcohol weekly or abuse of narcotics * Liver disease (defined as ALAT and/or ASAT ≥ 2 x normal levels) * Decreased kidney function (creatine levels over reference interval) * Uncontrollable increased blood pressure (\> 140/90 mmHg) * Low blood percentage (hemoglobin \< 8.3 mmol/l) * Special diet or planned weight change during trial period * Other conditions that could be expected to affect the primary or secondary outcomes