The quantitative cystinuria profile analysis (Cystinuria Profile Quantitative, by Gas Chromatography Mass Spectrometry - GC-MS) is an advanced laboratory test used to measure amino acid levels in urine and is considered an important tool for diagnosing cystinuria, a hereditary disorder that leads to the accumulation of cystine in the body. The analysis is performed using gas chromatography mass spectrometry, which allows precise measurement of cystine and other amino acids. This test helps physicians identify the causes of health problems associated with cystine, such as kidney stone formation, and guide appropriate treatment strategies. It is recommended for individuals who show symptoms related to amino acid disorders or have a family history of the condition.