The Random Urine Creatinine test measures the amount of creatinine in a single urine sample, typically collected at any time during the day, without the need for a 24-hour collection. Creatinine is a waste product produced by muscle metabolism and is usually excreted by the kidneys at a relatively constant rate. This test is often used to assess kidney function, though it is less precise than a 24-hour urine creatinine test. It can also be used to normalize the levels of other substances in urine, such as protein, to account for variations in urine concentration. Elevated or decreased creatinine levels can indicate kidney dysfunction or other health conditions.