← Thyroid & Autoimmune Β· Thyroid

Free T3

The active thyroid hormone; the one TSH alone can miss.

$ 105.00All-in price
1Tests included

Your TSH came back normal and you still feel slow, cold and foggy, or you're on thyroid medication and want to know whether it's converting. Free T3 is the hormone your cells actually use, and it's the piece most basic thyroid checks leave out. $105 is all-in. No draw fees, no physician fees, no surprise bills. Results usually in 1–2 business days, in your secure online account.

Included Tests

Free T3
incl.in panel

Who Should Get This Panel

  • Anyone with thyroid symptoms and a normal TSH, anyone on levothyroxine or desiccated thyroid asking whether T4 is converting to T3, and anyone whose clinician asked for a full thyroid picture.

Conditions Screened

HypothyroidismHyperthyroidismT4-to-T3 conversion problems

Related Symptoms

FatigueFeeling coldBrain fogWeight changeHair loss

Understanding Your Results

Low free T3 with a normal TSH and free T4 can mean poor conversion, illness or very low calorie intake; high free T3 points toward an overactive thyroid. Read it with TSH and free T4; on its own it rarely settles anything. Review with a clinician.

Frequently Asked Questions

Do I need to fast?
No.
Should I take my thyroid pill before the draw?
Ask your prescriber. Many prefer the draw before the morning dose so the result isn't a peak.
Is this in a panel?
Not yet in ours; order it with the Complete Thyroid Panel from the same draw.
How fast are results?
Usually 1–2 business days.

Add to the same draw

Each adds alongside Free T3: one visit, all-in prices.

Complete Blood Count (CBC w/ Diff)
Red cells, white cells, platelets; where anemia and infection show first
Same blood draw, no extra visit
$34
Comprehensive Metabolic Panel (CMP)
Kidneys, liver, blood sugar, electrolytes; the physical's core tube
Same blood draw, no extra visit
$45
Cholesterol Panel
Total, LDL, HDL, triglycerides; silent until it isn't
Same blood draw, no extra visit
$35
All-in. The price you see is the price you pay.
$ 105.00
βœ“ The price you see is the price you pay. No draw fees. No physician fees. No surprise bills. $ 105.00 is all-in.
Comparing prices? Some self-pay labs advertise a low number, then add a $6 physician fee at checkout. We don't. What you see here is the whole cost.
⚑ We send your lab order electronically to the test center in 2–3 minutes. Nothing to print, nothing to bring. Just walk in and sign in.
πŸ“ Can you get tested nearby?

Test centers don’t accept payment. You pay securely here; the lab just does the draw.
⚑ Results 1–2 business daysπŸ§ͺ 1 tests

What happens after you order?

  • 1Your lab order form & test code appear in your secure online account, with your test center’s address.
  • 2We send your lab requisition to the test center electronically.
  • 3Walk in & get tested. Tests usually take 5 minutes or less.
πŸ“ž Need support? (866) 873-0879
$ 105.00all-in Β· no extra fees