Serotonin 5-HT 24-Hour Urine Test
Comprehensive Neurotransmitter Assessment
The Serotonin 5-HT 24-Hour Urine Test represents a sophisticated diagnostic approach to evaluating serotonin metabolism and neurotransmitter balance within the body. Serotonin, scientifically known as 5-hydroxytryptamine (5-HT), serves as a crucial neurotransmitter and hormone that regulates numerous physiological processes including mood, appetite, sleep patterns, and gastrointestinal function. This comprehensive 24-hour urine collection provides clinicians with valuable data about serotonin production and metabolism patterns throughout an entire day, offering insights that single-point blood tests cannot capture.
What This Test Measures and Detects
The Serotonin 5-HT 24-Hour Urine Test specifically quantifies:
- Serotonin Metabolites: Measures 5-hydroxyindoleacetic acid (5-HIAA), the primary metabolite of serotonin
- Neurotransmitter Production: Assesses overall serotonin synthesis and turnover rates
- Carcinoid Tumor Markers: Detects elevated serotonin levels associated with neuroendocrine tumors
- Metabolic Pathway Function: Evaluates the efficiency of serotonin breakdown and elimination
Using state-of-the-art Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) technology, this test provides exceptional accuracy and sensitivity in detecting even subtle variations in serotonin metabolism. The 24-hour collection period ensures comprehensive assessment of daily serotonin fluctuations, providing clinicians with a complete picture of neurotransmitter dynamics.
Who Should Consider This Test
Clinical Indications and Symptoms
This test is particularly valuable for individuals experiencing:
- Unexplained Flushing Episodes: Sudden reddening of the face and neck
- Chronic Diarrhea: Persistent gastrointestinal disturbances without clear cause
- Mood Disorders: Depression, anxiety, or emotional instability
- Sleep Disturbances: Insomnia or irregular sleep patterns
- Gastrointestinal Symptoms: Abdominal pain, cramping, or bowel irregularities
- Suspected Carcinoid Syndrome: Classic triad of flushing, diarrhea, and wheezing
- Neuroendocrine Tumor Monitoring: Follow-up for diagnosed carcinoid tumors
- Treatment Response Assessment: Monitoring serotonin-modulating therapies
Benefits of Serotonin Testing
Undergoing the Serotonin 5-HT 24-Hour Urine Test offers numerous clinical advantages:
- Early Detection: Identifies neurotransmitter imbalances before severe symptoms develop
- Accurate Diagnosis: Differentiates between various causes of similar symptoms
- Treatment Guidance: Informs appropriate therapeutic interventions
- Disease Monitoring: Tracks progression or regression of neuroendocrine conditions
- Comprehensive Assessment: Provides 24-hour metabolic profile rather than single-point measurement
- Non-Invasive Collection: Urine testing eliminates the need for repeated blood draws
Understanding Your Test Results
Interpretation Guidelines
Your Serotonin 5-HT 24-Hour Urine Test results will fall into one of several categories:
Normal Range Results
Normal serotonin levels typically indicate balanced neurotransmitter function and absence of significant neuroendocrine abnormalities. However, clinical correlation with symptoms remains essential.
Elevated Serotonin Levels
Increased serotonin and 5-HIAA levels may suggest:
- Carcinoid tumors or other neuroendocrine neoplasms
- Serotonin syndrome from medication interactions
- Certain gastrointestinal disorders
- Metabolic conditions affecting neurotransmitter pathways
Reduced Serotonin Levels
Lower than expected levels might indicate:
- Nutritional deficiencies affecting serotonin synthesis
- Metabolic disorders impacting neurotransmitter production
- Certain medication effects on serotonin metabolism
- Genetic variations in serotonin pathway enzymes
Important: Always discuss your results with a qualified healthcare provider who can interpret them in the context of your complete clinical picture, symptoms, and medical history.
Test Details and Pricing
| Test Parameter | Details |
|---|---|
| Test Name | Serotonin 5-HT 24-Hour Urine Test |
| Regular Price | $226 USD |
| Discount Price | $162 USD |
| Turnaround Time | Sample: Wed/Sat by 9 AM; Report: 2 days |
| Sample Type | 50 mL (10 mL min.) aliquot of 24-hour urine |
| Testing Method | LC-MS/MS (Liquid Chromatography-Tandem Mass Spectrometry) |
| Specialty | Endocrinology |
Pre-Test Preparation Instructions
For accurate results, please follow these essential preparation guidelines:
- Dietary Restrictions: Avoid bananas, walnuts, tomatoes, pineapples, plums, gooseberries, mirabelles, melons, avocados, aubergines, and kiwi fruits for at least 48 hours before and during specimen collection
- Medication Avoidance: Discontinue methocarbamol, mephenesin, guaiphenesis, paracetamol, and salicylic acid medications 48 hours prior to testing (consult your physician)
- Activity Restrictions: Refrain from strenuous exercise during the 48-hour preparation period and collection day
- Collection Protocol: Collect urine with appropriate volume of 50% HCl to maintain pH between 1-2 (do not use concentrated HCl)
- Documentation: Record 24-hour volume on both test request form and urine container
- Shipping: Ship specimen refrigerated or frozen
Nationwide Testing Availability
GGC DNA provides comprehensive Serotonin 5-HT testing services across the United States with convenient locations in all major metropolitan areas including:
- New York City and surrounding regions
- Los Angeles and Southern California
- Chicago and Midwest territories
- Houston and Texas locations
- Miami and Florida centers
- Phoenix and Arizona facilities
- Philadelphia and Pennsylvania sites
- San Antonio and additional Texas locations
- San Diego and California centers
- Dallas and North Texas facilities
Take Control of Your Neurotransmitter Health
Understanding your serotonin levels provides crucial insights into your overall neurological and endocrine health. Whether you’re experiencing unexplained symptoms or monitoring an existing condition, the Serotonin 5-HT 24-Hour Urine Test offers comprehensive assessment using the most advanced diagnostic technology available.
Ready to schedule your test? Contact our dedicated healthcare team today to discuss your testing needs and arrange convenient specimen collection. Our experienced staff will guide you through the preparation process and ensure you receive the highest quality care.
Call or WhatsApp: +1(267) 388-9828
Take the first step toward understanding your neurotransmitter balance and optimizing your health outcomes. Book your Serotonin 5-HT 24-Hour Urine Test today and benefit from our current promotional pricing of only $162 USD.

