The test is used to determine the level of Serotonin in the blood. It helps in the detection of Carcinoid syndrome or tumours.
How to prepare for the test?
The patient is asked to avoid foods rich in Indoles. Foods such as tomato, plum, walnut, pineapple, brinjal are high in indoles. The patient is also asked to avoid tea and coffee for 3 days before collection of the sample.