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5-Hydroxyindoleacetic acid (5-HIAA) is the main metabolite of serotonin. The metabolic intermediate 5-hydroxyindoleacetaldehyde (5-HIAL) is formed from serotonin by monoamine oxidase (MAO) and then 5-HIAA is formed from 5-HIAL via aldehyde dehydrogenase (ALDH).
5-HIAA is a urine test that measures the amount of 5-hydroxyindoleacetic acid (5-HIAA). 5-HIAA is a breakdown product of a hormone called serotonin. This test tells how much 5-HIAA the body is producing, which reflects how much serotonin is in the body.
5-Hydroxy indoleacetic acid (5-HIAA) is the primary metabolite of serotonin. Serotonin is broken down into 5-hydroxy indoleacetic acid within the liver. 5-hydroxy indoleacetic acid is used as a proxy for serotonin measurement through a 24-hour urine test.
This test finds out how much 5-hydroxyindoleacetic acid (5-HIAA) is in your urine. This acid is a waste product that comes from the breakdown of serotonin by the liver. Serotonin is a hormone that plays a role in transmitting nerve impulses. It also affects your sleep and mood.
Serotonin measurement is used in conjunction with urinary 5-hydroxyindoleacetic acid (5-HIAA) and/or serum chromogranin A in the diagnosis of carcinoid syndrome.
24-Hour Urine Collection Instructions for Your 5-Hydroxyindoleacetic Acid (5-HIAA) Test. This information explains how to collect and store your urine (pee) so it can be tested for 5-hydroxyindoleacetic acid (5-hy-DROK-see-IN-dole-uh-SEE-tik A-sid), or 5-HIAA.
5-HIAA is a urine test that measures the amount of 5-hydroxyindoleacetic acid (5-HIAA). 5-HIAA is a breakdown product of a hormone called serotonin. This test tells how much 5-HIAA the body is producing, which reflects how much serotonin is in the body.