Assessment of BHB Concentration Agreement Among Sampling Locations and the Impact of Ketosis on EPO, and More

Inclusion Criteria: * Age 18-60 years * BMI 19-30 kg/m2 * Expected ease of catheter insertion * Considered of sound health * Oral and written informed consent Exclusion Criteria: * Inability to fully understand the consent including consent forms * Inability to cooperate to the study * electrolyte disorders * acute or chronic kidney disease or ompromised renal function including excess risk * servere hypertension * autoimmune disease * liver or bile disease * diabetes mellitus * reactive hypoglycemia or similar disorders * treatment with drugs, and dietary supplements with inference on key metabolic or hormonal markers, e.g. insulin, glucagon, DDP-IV inhibitors, GLP-1 RA, sulfunylurea * 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