Quest Test

Serotonin Blood Test

Quick Overview

The Serotonin test measures the level of serotonin in the blood.  This test is primarily used when symptoms suggest a carcinoid tumor and not to reveal the recurrence or the productiveness of treatment.

Test #29851


Availability: In stock

Also Known As 5-HT, Serum; 5-HT; 5-Hydroxytryptamine, Serum; 5-Hydroxy Tryptamine;

No fasting required. Avoid food high in indoles such as avocado, banana, tomato, plum, walnut, pineapple, and eggplant. Tobacco, tea and coffee should also be avoided three days prior to specimen collection. Serotonin levels may be affected by certain types of medications such as morphine, MAO inhibitors, methyldopa, and lithium. Check with physician before stopping any medications.

Test Results 4-11 days. May take longer based on weather, holiday or lab delays.

Serotonin is a chemical which is produced by nerve cells.  It is predominantly found in the digestive systems, although it is also found in blood platelets and throughout the central nervous system.  The serotonin test can aid in the diagnose of carcinoid syndrome. Carcinoid syndrome is a group of indicators linked to carcinoid tumors.  These are tumors of the bronchial tubes, colon, appendix, colon and small intestine.  

Symptoms of having this test performed may include:

  • Diarrhea
  • Nausea and vomiting
  • Rapid heartbeat
  • Flushing of the neck and face
  • Wheezing and coughing

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