Five-Hydroxyindoleacetic Acid (5-HIAA)

Five-Hydroxyindoleacetic Acid (5-HIAA) is a chemical found in the body that results from the breakdown of serotonin, a neurotransmitter that helps regulate mood, appetite, and sleep. Measuring the levels of 5-HIAA, often done through a urine test, can provide insights into serotonin production and metabolism. Elevated or decreased levels can indicate various health conditions, including certain types of tumors, such as carcinoid tumors, or gastrointestinal disorders. Understanding 5-HIAA levels can help healthcare providers diagnose and manage these conditions effectively.