A Methodological Study to Learn More About Kidney Function in Healthy People and in People With Reduced Kidney Function

Inclusion Criteria: * Participant must be 18 to 75 years of age inclusive, at the time of signing the ICF. * Stable medical condition defined as no new drug or other treatment prescribed for a chronic condition within 60 days prior to Study Day 1. * Body weight between 50 and 100 kg. * Female Participants: A participant is eligible to participate if not pregnant or breastfeeding. If a urine test cannot be confirmed as negative at screening (e.g., an ambiguous result), the participant must be excluded from participation. Exclusion Criteria: * Recent surgical intervention within 60 days prior to Study Day 1. * New clinical diagnosis established within 60 days prior to Study Day 1. * New drug prescription within 60 days prior to Study Day 1. * Relevant change in severity of any medical condition within 60 days prior to Study Day 1, e.g. disease flare. * Known congenital amino acid metabolism disorders. * Severe hypersensitivity to milk products. * Known liver cirrhosis. * Regular use of non-steroidal anti-inflammatory drugs (NSAIDs). * Impaired kidney function with eGFR \<30 mL/min/1.73m2