Tryptophan Quantitative Plasma Test
Short Name: Tryptophan Plasma Test
Also known as: Plasma Tryptophan Test, Tryptophan Level Test, Amino Acid Analysis for Tryptophan
Tryptophan Quantitative Plasma Test test available at DNA Labs India for ₹18,000. Uses Chromatography, Mass Spectrometry on Plasma samples. Results in Reports are available 2-3 weeks after sample collection, provided samples are submitted by the 7th of the month.. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr SULOCHANA HEMCHANDRA HOLLA
Consultant Medical Geneticist · Reg: 8532
Last reviewed: September 7, 2026
Overview
To quantify tryptophan levels in plasma for diagnosing inborn errors of metabolism, assessing nutritional status, and monitoring treatment plans for related disorders.
- Test Code
- 1451
- Price
- ₹18,000
- Sample Type
- Plasma
- Result Time
- Reports are available 2-3 weeks after sample collection, provided samples are submitted by the 7th of the month.
- Fasting Required
- Yes
- Method
- Chromatography, Mass Spectrometry
Sample Collection
Overnight fasting or at least 4 hours after a meal is mandatory for adults. Non-fasting samples are acceptable for pediatric patients. Duly filled Test Send Out Consent Form (Form 35) is required.
Method: Venipuncture
Laboratory Analysis
Blood is drawn via venipuncture into a sodium heparin tube. Plasma is separated and frozen within 2 hours of collection.
Report Delivery
Apply pressure to the puncture site to prevent bruising. Keep the area clean and dry.
Timeline: Reports are available 2-3 weeks after sample collection, provided samples are submitted by the 7th of the month.
Patient Instructions
About This Test
Who Should Get This Test
To quantify tryptophan levels in plasma for diagnosing inborn errors of metabolism, assessing nutritional status, and monitoring treatment plans for related disorders.
How to Prepare
- Fasting required for adults
- Use Green Top (Sodium Heparin) tube
- Separate plasma and freeze within 2 hours
- Ship frozen; do not thaw
- Submit Test Send Out Consent Form (Form 35)
Doctor's Notes
Reviewed by Dr SULOCHANA HEMCHANDRA HOLLA — MBBS, MD (Medical Genetics) · Reg. No. 8532
"This test is essential for evaluating tryptophan levels, which are linked to serotonin production and can indicate metabolic disorders or nutritional deficiencies. Early diagnosis aids in effective management."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Hemolyzed or insufficient sample volume
- Non-fasting adult samples without consent
- Missing consent form
Understanding Your Results
Action: Consult healthcare provider for dietary changes or supplements
Level: Low
Action: Maintain balanced diet; no immediate action needed
Level: Normal
Action: Further evaluation recommended
Level: High
If you experience persistent symptoms like depression, anxiety, or insomnia, or if test results are abnormal, consult a healthcare professional for personalized advice and treatment.
Limitations
- ⚠Results may vary based on individual metabolism
- ⚠Not a standalone diagnostic tool; clinical correlation is essential
- ⚠Limited to plasma tryptophan; does not assess other amino acids
Risks & Considerations
- ●Minor pain or bruising at the puncture site
- ●Rarely, dizziness or fainting
- ●Infection risk is minimal with proper care
Interfering Factors
- ●Non-fasting samples (for adults)
- ●Certain medications affecting serotonin levels
- ●Recent dietary changes high in tryptophan
Frequently Asked Questions
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