Inclusion Criteria:  • Age: 18-50 years and premenopausal (for women)  Exclusion criteria:  Weight instability (>5 kg change in body mass within last 6 months) Diagnosis of any form of diabetes Intolerances or allergies to any of the study procedures (e.g. lactose intolerance) Galactose disorders (e.g. galactokinase deficiency, UDPgalactose-4-epimerase deficiency, galactose-1-phosphate uridyl transferase deficiency) Fructose malabsorption Inborn errors of fructose metabolism (e.g. fructokinase deficiency, aldolase B deficiency, fructose-1,6-bisphosphatase deficiency) Pregnant or lactating Any condition that could introduce bias to the study (e.g. diagnoses of lipid disorders, including cardiovascular disease, or therapies that alter lipid or glucose metabolism, such as statins or niacin).