Mercapturic acid metabolites (total) in urine

What This Test Measures

Mercapturic acid metabolites are breakdown products of sulfur compounds (like those from environmental toxins, medications, or dietary sulfur-rich foods) that your liver converts and excretes through urine. This test detects the total amount of these metabolites, helping identify how efficiently your body is processing these substances.

Why It Might Be Ordered

Your healthcare provider may order this test if you’ve been exposed to potential toxins (e.g., certain chemicals, medications, or environmental pollutants) or if you have conditions that affect liver function or detox pathways. It can also be part of broader evaluations for occupational or environmental health concerns.

What to Expect Before the Test

No special preparation is typically needed, but you may be asked to collect a 24-hour urine sample. Follow your provider’s instructions carefully to ensure accurate results, such as timing and storage of the sample.

During the Test

The test involves collecting a urine sample, which is then analyzed in a lab to measure the total concentration of mercapturic acid metabolites. The sample may be tested using methods like chromatography or immunoassay to detect these compounds.