Serotonin

ChemistryAlso known as: Serotonin 24h Ur-mCncAlso known as: Serotonin 24h Ur-mRateAlso known as: Serotonin 24h Ur-sCncng/(24.h)

Measures serotonin metabolites excreted in blood collection.

Normal Range
30 – 230 ng/(24.h)
ng/(24.h)
Abnormal Levels
Consult your provider
Specimen Type
Blood

Why This Biomarker Matters

Serotonin regulates mood, sleep, and digestion. Abnormal levels may indicate mood disorders, sleep dysfunction, or neuroendocrine tumors requiring further investigation.

Understanding Your Results

Normal Range

30 – 230 ng/(24.h)

Overview

Serotonin is a neurotransmitter and hormone that regulates mood, sleep, appetite, and digestion. A 24-hour urine serotonin test measures the amount of serotonin metabolites excreted, reflecting overall serotonin production. This test may be ordered to evaluate mood disorders, sleep problems, gastrointestinal issues, or to screen for certain neuroendocrine tumors like carcinoid syndrome. Abnormal levels can provide clues to underlying metabolic or psychiatric conditions.

Technical Information (LOINC Codes)

Standardized laboratory codes for this biomarker

2939-7Primary
Serotonin [Mass/volume] in Blood
ng/mL
27057-9
Serotonin [Mass/volume] in Serum
ng/mL
18253-5
Serotonin [Mass/time] in 24 hour Urine
ng/(24.h)
2941-3
Serotonin [Mass/volume] in Platelets
ng/mL
17003-5
Serotonin [Mass/volume] in Urine
ng/mL
2940-5
Serotonin [Mass/volume] in Plasma
ng/mL
42671-8
Serotonin [Entitic mass] in Platelets
ng/10*9{platelets}
56978-0
Serotonin [Mass/volume] in 24 hour Urine
ng/mL
14910-4
Serotonin [Moles/volume] in Serum
nmol/L
71804-9
Serotonin [Entitic substance] in Platelets
nmol/10*9{platelets}
25524-0
Serotonin [Moles/volume] in Blood
umol/L
25981-2
Serotonin [Moles/volume] in 24 hour Urine
umol/L
26035-6
Serotonin [Moles/volume] in Plasma
umol/L
32339-4
Serotonin [Moles/time] in 24 hour Urine
nmol/(24.h)
34373-1
Serotonin [Moles/volume] in Urine
umol/L

Available Lab Tests

Order tests that measure this biomarker

Serotonin (Serum)

$81.13
Results in 2-5 business days