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ubertest.com | easy, affordable, and convenient blood tests
UberTests

Free T3 Thyroid Test

$7.99

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Evaluate thyroid function and assess abnormal binding protein disorders

Quick facts

Sample type

Serum (preferred) or plasma

Turnaround

2–4 business days

Fasting

No Fasting Required

Doctor’s order included

Licensed physician review and requisition included with every test.

Free T3 Thyroid Test

  • Thyroid Function
  • General Health & Wellness
    • Cpt Codes
    • 84481

    what is Free T3 Thyroid Test and why is it important?

    Evaluate thyroid function and assess abnormal binding protein disorders

    Consider taking the Free T3 Thyroid Test if you are experiencing symptoms such as:

    • Symptoms of Hyperthyroidism (High T3): Unexplained weight loss, rapid or irregular heartbeat, anxiety, nervousness, irritability, tremors, increased sweating, heat intolerance, or difficulty sleeping.
    • Symptoms of Hypothyroidism (Low T3 - less common for primary diagnosis): Unexplained fatigue, weight gain, feeling cold, dry skin, hair loss, constipation, muscle aches, or depression.
    • Your healthcare provider suspects a thyroid imbalance based on other clinical findings or initial blood tests (like TSH or Free T4).
    • You are being treated for a thyroid condition, and your doctor wants to assess your body's active thyroid hormone levels.

    The Free T3 Thyroid Test is beneficial for individuals who:

    • Are experiencing symptoms associated with an overactive thyroid (hyperthyroidism) or an underactive thyroid (hypothyroidism).
    • Have been diagnosed with a thyroid disorder and need to monitor the effectiveness of their treatment.
    • Have an abnormal TSH (Thyroid-Stimulating Hormone) or Free T4 result and need further evaluation of thyroid function.
    • Are taking medications that affect thyroid hormone levels.
    • Have a family history of thyroid conditions and want to understand their thyroid health more comprehensively.

    The Free T3 Thyroid Test is commonly used for the diagnosis, evaluation, and monitoring of various thyroid conditions. Specifically, it helps in:

    • Diagnosing Hyperthyroidism: Identifying an overactive thyroid gland, where T3 levels are elevated, leading to symptoms such as rapid heartbeat, weight loss, and anxiety.
    • Assessing the Severity of Hyperthyroidism: Free T3 levels often correlate with the severity of an overactive thyroid.
    • Monitoring Thyroid Hormone Replacement Therapy: Ensuring that individuals on thyroid medication, particularly those taking T3 supplements, are receiving appropriate dosing.
    • Investigating Subclinical Thyroid Disorders: When TSH levels are slightly abnormal but Free T4 is normal, a Free T3 test can sometimes provide additional clarity.
    • Evaluating Resistant Hypothyroidism: In rare cases, where typical T4 replacement doesn't alleviate symptoms, assessing Free T3 can be helpful.
    • Diagnosing T3 Thyrotoxicosis: A specific form of hyperthyroidism where T3 is elevated, but T4 may be normal or only slightly elevated.

    Caution

    Please remember that laboratory test results should always be interpreted in the context of your overall health, symptoms, and medical history. This test provides valuable information about your thyroid hormone levels, but a diagnosis or treatment plan should only be made by a qualified healthcare provider. Consult your doctor to discuss your results and for personalized medical advice.

    Frequently Ordered Together

    How It Works?

    1
    Add Your Test to Cart and Check out

    once Test Order is received, Our physicians will review your request and email you the easy-to-follow requisition form.

    2
    Locate and Visit Your Nearest Laboratory

    Find the closest partner location—most are within 2–3 miles—and drop by for a quick, no‑appointment blood draw.

    3
    Get your Results Online

    Once your sample is processed, we’ll send your report straight to your inbox within 1–3 business days. Just click the link to view your results anytime.

    4
    Book a Optional Consult

    Have Questions about results? Book a phone or video visit with one of our doctors. They’ll walk you through your report, explain any findings, and recommend next steps