What's the difference between the Basic and Complete Thyroid Panels?

The Basic panel includes TSH, Free T4, and Free T3 - the core markers. The Complete panel adds Reverse T3 and thyroid antibodies for detecting autoimmune thyroid disease and conversion issues.

Is this enough testing for thyroid symptoms?

For most people, yes. If results are normal but you still have symptoms, consider the Complete Thyroid Panel which includes antibodies (for Hashimoto's) and Reverse T3.

Why test Free T3 instead of just TSH?

TSH alone can miss problems. Some people have normal TSH but low T3 (the active hormone) - especially if they don't convert T4 to T3 well. Testing all three gives a complete picture.

How often should I test my thyroid?

For screening, annually is usually sufficient. If on thyroid medication, test every 6-12 weeks when adjusting doses, then every 6-12 months once stable.

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Panel🦋 Thyroid

Basic Thyroid Panel - Essential Thyroid Testing

This panel includes the 3 essential thyroid markers: TSH, Free T4, and Free T3. The perfect starting point for evaluating thyroid function without unnecessary tests.

Not everyone needs a complete thyroid panel. This basic panel covers the three most important thyroid markers:

• TSH - The master controller from your pituitary that tells your thyroid how much hormone to make • Free T4 - The main hormone your thyroid produces • Free T3 - The active hormone your cells actually use

Together, these markers show whether your thyroid is producing enough hormones and whether your body is converting them properly. This panel is ideal for routine thyroid screening or monitoring existing thyroid conditions.

Panel Price

$30

All-in

$48

incl. $18 lab & physician fee

You Save

Biomarkers

3 tests

Included Tests

TSH (Thyroid Stimulating Hormone)

Measures thyroid-stimulating hormone to evaluate thyroid function. TSH is the most sensitive marker for detecting thyroid disorders.

TSH

Free T4 (Thyroxine)

Measures the unbound, active form of the thyroid hormone T4. Helps assess thyroid function and diagnose thyroid conditions.

Free T4

Free T3 (Triiodothyronine)

Measures the active thyroid hormone T3. Important for evaluating thyroid function, especially in hyperthyroidism.

Free T3

$14

No fasting needed. How to prepare for your blood test →

What This Panel Measures

This panel measures the three core thyroid hormones: TSH (the pituitary signal, normal 0.4-4.0 mIU/L), Free T4 (thyroid output, normal 0.8-1.8 ng/dL), and Free T3 (active hormone, normal 2.3-4.2 pg/mL). These markers reveal if your thyroid is functioning properly.

Who Should Get This Panel

Anyone wanting a basic thyroid checkup, people with symptoms like fatigue, weight changes, or hair loss, those monitoring thyroid medication, and anyone with family history of thyroid disease. Also great for annual health screening.

Health Insights

Conditions Screened

HypothyroidismHyperthyroidismSubclinical thyroid diseaseT4 to T3 conversion issues

Related Symptoms

FatigueWeight gainWeight lossHair lossCold intoleranceHeat intoleranceBrain fogDry skinMood changes

When to Get Tested

No fasting required. Test anytime, though morning testing is often preferred for consistency. If on thyroid medication, test before your daily dose.

Understanding Your Results

Optimal ranges: TSH 0.5-2.5 mIU/L, Free T4 1.0-1.5 ng/dL, Free T3 3.0-4.0 pg/mL. High TSH with low T4/T3 suggests hypothyroidism. Low TSH with high T4/T3 suggests hyperthyroidism.

How much does the Basic Thyroid Panel cost?

The Basic Thyroid Panel costs $30 at JustLabs — $48 all-in, since the $18 lab & physician order fee is charged once per order, however many tests you add. The price is fixed before your blood draw; no insurance or doctor visit needed.

Option	Price	Order all-in	Notes
Basic Thyroid Panel at JustLabsDrawn at Quest Diagnostics	$30	$48	Includes the one $18 fee, charged once per order
The same 3 tests ordered individually	$32	$50	The panel saves $2

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