Search tests, scans & packages
Cart Reports
Search tests, scans & packages
Lab test · Immunology

Thyroxine Binding Globulin

The Thyroxine Binding Globulin (TBG) test measures the protein that carries thyroid hormones in the blood to help assess thyroid function.
4.912,480+ patients have rated Prima
NABL-certified lab Free home collection Report in 24 hrs
ReportWithin 24 hrs
SampleBlood
CollectionHome or centre
FastingNot needed
How it works
1
Book in a minute
Add to cart, pick a date and time slot, pay online or at collection.
2
Sample collected at home or centre
A trained phlebotomist arrives in your slot with sealed, single-use kits.
3
Report on WhatsApp
Within 24 hours on WhatsApp and under My Orders.
Preparation
No special preparation needed unless your doctor advises otherwise.
About this test
The Thyroxine Binding Globulin (TBG) test measures the protein that carries thyroid hormones in the blood to help assess thyroid function.

The Thyroxine Binding Globulin (TBG) test is a blood test used to measure the level of TBG, a protein responsible for transporting thyroid hormones (T3 and T4) in the bloodstream.

Most thyroid hormones are bound to proteins like TBG, and only a small fraction remains free and biologically active. Abnormal TBG levels can affect total thyroid hormone measurements without altering actual thyroid function.

This test is useful in evaluating unexplained abnormalities in total T3 and T4 levels, and in conditions such as pregnancy, liver disease, or genetic variations affecting TBG levels. It helps differentiate between true thyroid dysfunction and altered protein binding.

The purpose of this test is to

  • To measure TBG levels in the blood
  • To assess thyroid hormone transport
  • To help interpret abnormal T3 and T4 results
  • To differentiate binding abnormalities from thyroid disorders
  • To support endocrine evaluation
What patients say about Prima
4.9
12,480+ patients rated Prima Diagnostics
RK
Ramesh K.
Verified · 2 weeks ago
5.0
Quick appointment and the staff explained everything. Report came the same evening on WhatsApp.
Booked: MRI Brain
SP
Sneha P.
Verified · 1 month ago
4.5
Booking on the app was simple and pricing was clear with no hidden charges.
Booked: Full Body Checkup
AM
Anita M.
Verified · 1 week ago
5.0
Home collection was right on time and completely painless. Very professional.
Booked: Thyroid Profile
VS
Vikram S.
Verified · 3 days ago
5.0
Great value and fast report. Booked at 9am and had results by evening.
Booked: CBC
Questions people ask
How soon will I get my report?
Your report is delivered within 24 hours of sample collection — on WhatsApp and under My Orders.
Is home sample collection available?
Yes. A trained phlebotomist visits your home with sealed, single-use kits. Home collection is free.
Do I need to fast or prepare?
No fasting is required for this test unless your doctor advises otherwise.
How do I pay?
Pay online (UPI / cards) or pay at collection or at the centre. The price you see is what you pay — it includes the report, with no hidden charges.
Is the lab accredited?
Yes. Prima Diagnostics runs NABL-certified labs with strict quality control across 7 centres in Bengaluru.
People also bookView all
Lab test Blood Test Report in 24 hrs ₹225 Lab test 17 Alpha Hydroxy Progesterone Report in 24 hrs ₹1,960 Lab test 25OH Vitamin D,D2,D3 Ultrasensitive by LCMS Report in 24 hrs ₹3,025 Lab test 2HE4 (Human Epididymis Protein 4) Report in 24 hrs ₹3,340
₹9,280
Same price at all centres · Incl. report