IncretinsGastric Inhibitory PolypeptideGlucagon-Like Peptide 1Dipeptidyl-Peptidase IV InhibitorsDipeptidyl Peptidase 4Glucagon-Like PeptidesReceptors, GlucagonHormonesGastric BypassGlucagonDiabetes Mellitus, Type 2Thyroid HormonesFollicle Stimulating HormoneInsulinLuteinizing HormoneObesity, MorbidBariatric SurgeryInsulin-Secreting CellsBlood GlucoseHypoglycemic AgentsParathyroid HormoneGonadotropin-Releasing HormoneGonadal Steroid HormonesPostprandial PeriodGlucoseReceptors, Thyroid HormoneHuman Growth HormoneGlucose Tolerance TestAdrenocorticotropic HormonePituitary HormonesTriiodothyronineJuvenile HormonesHormone Replacement Therapy