Thyroid Health - Basic Plus Lab Panel Most Popular

The Thyroid Health - Basic Plus Lab Panel panel contains 6 tests with 8 biomarkers.

The Thyroid Health - Basic Plus lab panel contains 6 tests with 8 biomarkers to give you an overview of your thyroid health. This panel includes all of the Thyroid Health - Basic tests, plus T3 Total and T3, Free. You can make informed decisions about your health and take steps to improve your thyroid function with this information.

The Thyroid Health - Basic Plus lab panel includes:

  • Thyroid-Stimulating Hormone (TSH)
  • T3 Uptake
  • T4 (Thyroxine), Total
  • T4, Free
  • T3 Total
  • T3, Free

What does the thyroid do?
A butterfly-shaped gland called the thyroid is found at the front of the neck. Thyroid hormones are created by the thyroid and released into the bloodstream, where they are carried by the blood to all bodily tissues. Thyroid hormones help the body use energy, keep its temperature steady, and keep the brain, heart, muscles, and other organs working properly.

What do thyroid hormones do?
Thyroid hormones are a big part of how your metabolism (how your body uses energy) works. They also change how the body grows and develops, how hot or cold it gets, and how sensitive it is to other hormones.

Thyroid hormone levels can change during the day, so it's important to check them several times over time to get a clear picture of what's going on.

The Thyroid Health - Basic Plus lab panel can help you understand your thyroid function and identify potential problems so you can take steps to improve your health.

For a more thorough understanding of your thyroid health, consider the Thyroid Health - Advanced Lab panel with additional T3 Reverse (RT3), Thyroid Peroxidase, and Thyroglobulin Antibodies tests. And for the most complete thyroid panel, consider the Thyroid Health - Comprehensive lab panel with all the tests in the advanced panel plus TBG (Thyroxine Binding Globulin) and TSI (Thyroid Stimulating Immunoglobulin).

The following is a list of what is included in the item above. Click the test(s) below to view what biomarkers are measured along with an explanation of what the biomarker is measuring.

Also known as: Triiodothyronine

T3, Total

Triiodothyronine (T3) is a thyroid hormone. It plays an important role in the body's control of metabolism.

T3 Uptake

T3 uptake is also known as T3 Resin Uptake (T3RU) or Thyroid Uptake. It estimates how much thyroid hormone-binding proteins are available in the blood through a calculation based on levels of T3 or T4 added to a person's blood specimen.

Also known as: Free T3, FT3, T3 Free

T3, Free

This test measures the amount of triiodothyronine, or T3, in the blood.

Also known as: T4 Thyroxine Total

Free T4 Index (T7)

FTI stands for the Free Thyroxine Index and is also sometimes referred to as T7. It is a calculated value determined from the T3 uptake test and total T4 test and provides an estimate of the level of free T4 in the blood.

T4 (Thyroxine), Total

This test measures the amount of thyroxine, or T4, in the blood. T4 is one of two major hormones produced by the thyroid gland. The total T4 test is used to help diagnose hyperthyroidism and hypothyroidism. It is a useful test but can be affected by the amount of protein available in the blood to bind to the hormone.

Also known as: Free T4, FT4, T4 Free

T4, Free

The free T4 test is not affected by protein levels. Since free T4 is the active form of thyroxine, the free T4 test is may be a more accurate reflection of thyroid hormone function.

Also known as: Thyroid Stimulating Hormone, Thyroid Stimulating Hormone (TSH), Thyrotropin


A TSH test is a lab test that measures the amount of thyroid stimulating hormone (TSH) in your blood. TSH is produced by the pituitary gland. It tells the thyroid gland to make and release thyroid hormones into the blood.


*Process times are an estimate and are not guaranteed. The lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.

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