Comprehensive Thyroid Panel

Our lab tests are currently available only in the United States. 

If you’re located outside the U.S., please email ashleyc@nutritiondetective.com with any questions.

Our blood testing is done only through LabCorp. We will email you a blood work order to print out.

What’s Included:

• Thyroid Comprehensive Panel I

• Thyroid Stimulating Hormone (TSH)

• Total T3

• Total T4

• Free T3

• Free T4

• Reverse T3

• Anti-thyroglobulin antibodies

• Anti-thyroperoxidase antibodies

A broad thyroid panel for people who want more than TSH alone.

This panel includes TSH, total and free T4 and T3, reverse T3, and thyroid antibodies.

Who should consider this panel?

This panel may be useful if you have:

• Fatigue

• Cold intolerance

• Heat intolerance

• Weight gain or weight loss

• Hair thinning

• Constipation

• Diarrhea

• Dry skin

• Anxiety

• Depression

• Palpitations

• Menstrual changes

• Infertility

What can this panel help investigate?

Hypothyroidism, hyperthyroidism, Hashimoto thyroiditis, Graves disease, autoimmune thyroid disease, and abnormal thyroid hormone conversion.

Before the Blood Draw:

Fasting: Not required.

Best time of day: Morning is preferred.

Menstrual Cycle Timing: No specific cycle day is required.

Biotin: Stop all biotin-containing supplements for 72 hours before testing. Hair, skin, and nail supplements are common sources of high-dose biotin.

Thyroid medication: Delay thyroid hormone medication until after the blood draw. To obtain accurate baseline levels, patients should skip their morning dose on the test day, have their blood drawn in the early morning (ideally around 9 am), and take their medication immediately after the sample is collected. When serially monitoring thyroid levels, consistency in whether the medication was taken before or after the blood draw is important. 

Medications: Do not stop or change prescription medications (including thyroid hormones) unless instructed to do so by the prescribing clinician.