Chemistry Tests

1 biomarker Peer-reviewed

Biomarkers in this category

1 biomarker · optimal ranges shown

5-Hydroxyindolacetic acid (5-HIAA) is an important chemical compound in the medical and biochemical fields, acting as a primary interest for its role as a metabolite in the human body. Essentially, it's what remains after serotonin, a key neurotransmitter responsible for regulating mood, appetite, and sleep among other functions, is broken down. The body converts serotonin into 5-HIAA, which is then excreted in the urine. Because serotonin is so crucial to many bodily functions, measuring the levels of 5-HIAA can provide valuable insights into a person's serotonin activity. This measurement is particularly useful in diagnosing and monitoring certain types of neuroendocrine tumors, such as carcinoid tumors, which can produce excessive amounts of serotonin. Elevated levels of 5-HIAA in the urine can indicate the presence of such tumors. Testing for 5-HIAA typically involves collecting urine over a 24-hour period to get an accurate assessment of its concentration. Understanding 5-HIAA levels can help guide treatment plans and monitor disease progression or response to therapy, making it a vital marker in the landscape of medical diagnostics and patient care.