Current promotion
Thyroid Function Blood Test Panels: TSH, Free T4 & Free T3
From a basic TSH and T4 screen to a full antibody workup, thyroid panels for every level of detail.
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Panels from $36.76 with the 20% promotion (regular prices from $45.95), promotional pricing at time of writing.
At a glance
Thyroid blood test panels measure thyroid-stimulating hormone (TSH), total and free T4 and T3, and, in more comprehensive versions, Reverse T3 and thyroid antibodies, to show how well your thyroid is functioning. Options range from a four-test basic screen to a twelve-biomarker comprehensive workup, so you can match the depth of testing to your situation. These direct-to-consumer panels suit adults tracking energy, weight, and metabolism-related markers, or following existing thyroid results with their doctor.
Best suited for
- Adults experiencing persistent fatigue, unexpected weight changes, or mood swings who want objective thyroid data to review with a doctor
- People with a family history of thyroid or autoimmune conditions who want to establish a baseline
- Anyone with previous borderline thyroid results who wants to track levels over time
- People taking thyroid medication who, with their clinician's guidance, want convenient interim lab checks
- Health-conscious adults who want a deeper look than a TSH-only screen
What's included
Thyroid Health - Basic Lab Panel
T3 Uptake, T4 Total, Free T4, and TSH
Thyroid Health - Basic Plus Lab Panel
Adds T3 Total and Free T3 to the basic screen
Thyroid Health - Advanced Lab Panel
8 tests, 10 biomarkers
Thyroid Health - Comprehensive Lab Panel
10 tests including Reverse T3, thyroxine-binding globulin, TPO and thyroglobulin antibodies, and TSI
The Top 10 Thyroid Lab Tests
9 tests, 11 biomarkers
Thyroid, T4, FT4, T3 Uptake
Thyroid, T4, FT4, T3 Uptake, TSH
Thyroid, T4, FT4, T3 Uptake, TSH, FT3
Thyroid, T4, FT4, T3 Uptake, TSH, FT3, T3 Total
Thyroid, T4, FT4, T3 Up, TSH, FT3, T3 Total, T3R
Adds Reverse T3 for a deeper look at thyroid hormone metabolism
Thyroid Profile 9 (9 Tests)
Thyroid Profile 10 (10 Tests)
Thyroid Profile 11 (11 Tests)
Thyroid Add-On Panel
Thyroid Foundation Panel
13 tests, 23 biomarkers
Thyroid Foundation Panel Plus Thyroid Panel Add-On
15 tests, 78 biomarkers
Key biomarker ranges
Commonly used adult reference ranges for markers this panel measures, labs vary, so always interpret results against your lab's stated ranges and with your doctor.
Commonly used reference ranges run roughly 0.4–4.0 µIU/mL; TSH moves inversely to thyroid activity, and time of day, illness, and biotin can skew results.
| Zone | Range |
|---|---|
| Low | 0–0.4 µIU/mL |
| Normal range | 0.4–4 µIU/mL |
| Mildly elevated | 4–6 µIU/mL |
| High | 6–10 µIU/mL |
Commonly used reference ranges run roughly 2.3–4.2 pg/mL; Free T3 is best interpreted alongside TSH and Free T4 rather than in isolation.
| Zone | Range |
|---|---|
| Low | 0–2.3 pg/mL |
| Normal range | 2.3–4.2 pg/mL |
| High | 4.2–6 pg/mL |
Commonly used reference ranges run roughly 0.8–1.8 ng/dL; Free T4 shows thyroid hormone supply, while TSH shows the pituitary’s demand signal.
| Zone | Range |
|---|---|
| Low | 0–0.8 ng/dL |
| Normal range | 0.8–1.8 ng/dL |
| High | 1.8–3 ng/dL |
The importance of testing
Your thyroid gland sets the pace for your metabolism, and the hormones it produces influence energy, body weight, temperature regulation, heart rate, and mood. A thyroid blood panel measures TSH, the pituitary signal that drives thyroid activity, alongside T4 and T3, the hormones the gland actually produces, giving you an objective look at how this system is functioning.
The panels on this page range from a four-test basic screen (T3 Uptake, T4 Total, Free T4, and TSH) to a comprehensive workup that adds Reverse T3, thyroxine-binding globulin, and antibody tests. Thyroid peroxidase and thyroglobulin antibodies, TSI, and TRAb are markers associated with autoimmune thyroid conditions such as Hashimoto's thyroiditis and Graves' disease, and they can add useful context when hormone levels alone don't tell the whole story.
Because thyroid values often shift gradually, a single result is most useful as a baseline. Retesting over time lets you track whether TSH, Free T4, and Free T3 are stable or trending, which is especially relevant if you have had borderline results, changed medications, or noticed symptoms like persistent fatigue or unexplained weight changes.
Any out-of-range or shifting result is a flag to review with your doctor, who can interpret your numbers in the context of your symptoms, history, and medications, lab values on their own are information, not a medical conclusion.
Promo code
ULTATHSave 20% with code ULTATH, current promotion; confirm final pricing on the partner page.
Ready to get your numbers? Order online, visit a nearby draw site, and receive private results to review with your doctor.
Order NowFrequently asked questions
What do these thyroid panels measure?
They measure thyroid-stimulating hormone (TSH), total and free forms of T4 and T3, and T3 Uptake, with the more comprehensive panels adding Reverse T3, thyroxine-binding globulin, and thyroid antibodies (TPO, thyroglobulin antibodies, TSI, and TRAb). Together these biomarkers show how much hormone your thyroid is producing and how the pituitary gland is responding.
Which thyroid panel should I choose?
A basic panel (T3 Uptake, T4 Total, Free T4, and TSH) is a reasonable starting point for a first-time snapshot of thyroid function. If you have symptoms, a family history of thyroid or autoimmune conditions, or previous borderline results, a comprehensive panel that includes Reverse T3 and antibody markers gives you and your doctor more context to work with.
Can I order a thyroid blood test without a doctor's visit?
Yes, these panels are ordered directly online through the partner page, with the blood draw completed at a local lab location, so no separate doctor's appointment is needed to purchase. Your results are still best reviewed with your own doctor, who can interpret them alongside your symptoms and history.
Is direct-to-consumer thyroid testing available in every US state?
No. Direct-to-consumer lab testing is restricted or prohibited in New York, New Jersey, and Rhode Island, so residents of those states may be blocked at the partner's checkout.
Do I need to fast before a thyroid test?
Fasting is generally not required for thyroid hormone tests, but preparation can vary by panel, check the specific instructions on the partner page before your blood draw.
Is there a discount code for these thyroid panels?
Yes, at the time of writing, code ULTATH takes 20% off the Thyroid Health Check panels. Promotions can change, so confirm the final price at checkout on the partner page.
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