Creatine is produced primarily in the liver and kidneys and used by muscles for energy. Urinary creatine measurement can help evaluate muscle disorders, inherited creatine metabolism abnormalities, and certain nutritional or supplementation issues.
This test is used in specialized evaluation of muscle disease, inherited creatine deficiency syndromes, and creatine metabolism disorders. Results are typically interpreted alongside serum creatinine and other muscle markers. Sample type is urine.