Markers of Appetite Regulation During Exogenous Ketosis

Inclusion Criteria: * Males aged 18-65 years * BMI 20-35 kg/m2 * Expected ease of catheter insertion * Oral and written informed consent Exclusion Criteria: * Inability to fully understand the consent including consent forms * Inability to cooperate to the trial * Any electrolyte disorders, kidney disease or otherwise compromised renal function including excess risk hereof, e.g. hypertension, albuminuria, autoimmune disease, family history of kidney disease * Any liver or bile disease including excess risk hereof, e.g. hepatotoxic drugs, alcohol abuse disorder, gallstones, pancreatitis, autoimmune disease, family history of liver disease * Diabetes mellitus or any metabolic and/or hormonal disease including diagnosed/undiagnosed reactive hypoglycemia or similar disorders. This includes treatment with drugs, dietary supplement with inference on key metabolic or hormonal markers, e.g. insulin, glukagon, lipids, and GLP-1 * Any use of illegal or otherwise use of medicinal products without prescription * Anemia or other know disease of the hematopoietic system * Previous bariatric surgery * Previous myocardial infarction or uncontrolled myocardial ischemia * Recent intended/unintended weight loss * Allergies to catheters or adhesives