T3 Reverse Test
Short Name: T3 Reverse
Also known as: Reverse T3, rT3, Reverse Triiodothyronine
T3 Reverse Test test available at DNA Labs India for ₹19,000. Uses LC/MS/MS on Serum samples. Results in 2-3 weeks. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr Pasupathy Arumugam
Consultant Pathologist · Reg: 21521
Last reviewed: September 7, 2026
Overview
The T3 Reverse test measures the levels of reverse T3 hormone in the blood to diagnose thyroid-related disorders and non-thyroidal illness (NTI).
- Test Code
- 1427
- Price
- ₹19,000
- Sample Type
- Serum
- Result Time
- 2-3 weeks
- Fasting Required
- No
- Method
- LC/MS/MS
Sample Collection
Complete and submit the Test Send Out Consent Form (Form 35). No fasting is required.
Method: Venipuncture
Laboratory Analysis
A blood sample will be drawn from a vein in your arm using a needle. The procedure takes a few minutes.
Report Delivery
Apply pressure to the puncture site to stop bleeding. You can resume normal activities immediately.
Timeline: 2-3 weeks
Patient Instructions
About This Test
Who Should Get This Test
The T3 Reverse test measures the levels of reverse T3 hormone in the blood to diagnose thyroid-related disorders and non-thyroidal illness (NTI).
How to Prepare
- Fill the mandatory consent form (Form 35)
- No fasting required
- Wear loose clothing for easy access
- Stay hydrated if possible
Doctor's Notes
Reviewed by Dr Pasupathy Arumugam — MBBS, MD (Pathology) · Reg. No. 21521
"The T3 Reverse test is essential for diagnosing non-thyroidal illness and differentiating conditions in neonates. Consult an endocrinologist for accurate interpretation."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Inadequate sample volume
- Improper labeling
- Hemolyzed or clotted sample
Understanding Your Results
Level: High
Level: Low
If you have symptoms of thyroid disorders such as weight changes, fatigue, or hair loss, or if your test results are abnormal, consult an endocrinologist for evaluation and management.
Limitations
- ⚠Not a standalone diagnostic test
- ⚠Results may be affected by non-thyroidal conditions
- ⚠Requires correlation with clinical symptoms
Risks & Considerations
- ●Minor bruising or pain at the puncture site
- ●Rare risk of infection
- ●Light-headedness in some individuals
Interfering Factors
- ●Certain medications
- ●Acute illness states
- ●Fasting or malnutrition
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Frequently Asked Questions
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