A Study in Healthy Male Volunteers Investigating the Safety, Absorption and Elimination of Single Doses of GLPG4059

Inclusion Criteria: * Male between 18-54 years of age (extremes included), on the date of signing the informed consent form (ICF). * A body mass index (BMI) between 18-30 kg/m2, inclusive. * Judged to be in good health by the investigator based upon the results of a medical history, physical examination, vital signs, 12-lead ECG, and fasting clinical laboratory safety tests, available at screening and prior to randomization. ECG and vital signs parameters must be within the normal ranges. Bilirubin, aspartate aminotransferase (AST), and alanine aminotransferase (ALT) must be no greater than 1.5x upper limit of normal (ULN). Fasting plasma glucose must be \<6.99 mmol/L, fasting defined as no caloric intake for at least 8 hours and hemoglobin A1c (HbA1c) \<6.5% (48 mmol/mol). The test should be performed in a laboratory using a method that is national glycohemoglobin standardization program (NGSP) certified and standardized to the diabetes control and complications trial (DCCT) assay. Other clinical laboratory safety test results must be within the reference ranges or test results that are outside the reference ranges need to be considered not clinically significant in the opinion of the investigator. This list only contains the key inclusion criteria. Exclusion Criteria: * Known hypersensitivity to Investigational Medicinal Product (IMP) ingredients or history of a significant allergic reaction to IMP ingredients as determined by the investigator. * Positive serology for hepatitis B virus surface antigen (HBsAg) or hepatitis C virus (HCV) or history of hepatitis from any cause with the exception of hepatitis A that was resolved at least 3 months prior to first dosing of the IMP. This list only contains the key exclusion criteria.