Always Tired? Check Your Thyroid & Adrenal Health

Woman on couch feeling fatigued due to thyroid hormones
Woman on couch feeling fatigued due to thyroid hormones

Are you suffering from fatigue?

Your adrenal gland is tied to how your body deals with stress. Blood tests for adrenal function measure cortisol levels and other hormones to determine whether your adrenal gland is healthy. Similarly, thyroid hormones like T4 can tell you if you have hyperthyroidism and other disorders. Test for healthy thyroid and adrenal function today. Traditional blood testing and saliva testing available.

What do thyroid and adrenal tests look for?

  • Thyroid hormones like TSH, T4, Free T3 and Free T4
  • Stress-related hormones such as DHEA and cortisol
  • Circulating levels of biomarkers of chronic fatigue
  • Markers of thyroid disease and other disorders


How Life Extension lab testing works


1-800-226-2370 - This service is FREE
8-1 AM Mon-Fri | 9-1 AM Sat-Sun (ET)

Essentials Quiz

Answer a few questions to choose the right supplements

Thyroid & Adrenal Health Lab Tests

Our comprehensive thyroid hormone test panels will let you know how much total and free thyroid hormones you have in your system. The adrenal stress tests use saliva to determine how your body is reacting to stress. Take a test today—and find out whether you’re suffering from thyroid or adrenal gland deficiency.

A thyroid lab test that evaluates hormone levels

  • Save

Thyroid hormones often change over time. This basic thyroid blood test panel can provide a clear picture of thyroid hormone production, which can help guide thyroid hormone replacement therapy.

Thorough thyroid function lab test

  • Save

Our thyroid function lab test assesses all the basics, plus reverse T3, thyroglobulin antibody (ATA) and thyroid peroxidase antibody (TPO) to provide a detailed evaluation of the thyroid.

Screens for thyroid disease

  • Save

The blood test for thyroid stimulating hormone (TSH) is a screening test for suboptimal thyroid function. A higher than normal TSH level may suggest the need for thyroid hormone replacement.

Lab test for thyroid function

  • Save

The Thyroid Panel with Reverse T3 Blood Test will help you determine whether you have any of the three “usual suspects” of an abnormal thyroid function: not enough production of T4, reduced conversion of T4 to T3, or greater production of inhibitory reverse T3.

Tests for chronic stress impact

  • Save

This test measures blood levels of cortisol, a hormone released by the adrenal glands during stress. A high cortisol level may indicate chronic stress.

Measures the adrenal glands’ response to stress

  • Save

We think of stress as a concept—but it is in fact a measurable biological phenomenon. This saliva test measures levels of DHEA, the antibody secretory IgA and cortisol at 4 different times of the day to assess your body’s stress response.

Measures thyroid protein antibodies associated with autoimmunity

  • Save

This panel assesses proteins involved in the production of thyroid hormones. It is possible for antibodies from your own immune system to attack these proteins, rendering them dysfunctional and resulting in fatigue, weight gain, constipation and other symptoms of low thyroid.

Thyroid function marker

  • Save

Triiodothyronine (T3) is a major thyroid hormone. This test measures the amount of T3 available to the tissues, or free T3. Many doctors believe that evaluating the levels of free T3 is the best way to assess your thyroid function.

Tests for reverse T3, a nonfunctioning form of the active hormone T3.

  • Save

Testing for blood levels of reverse T3, a nonfunctioning form of T3, can be informative for people experiencing symptoms of hypothyroidism, which can be associated with high reverse T3 levels.

Measures thyroid peroxidase antibody to assess thyroid function

  • Save

If you or your health practitioner is concerned that you may have developed a low thyroid condition, this test will detect antibodies to thyroid peroxidase (TPO) levels, which are markers of autoimmune thyroid disease.

Tests the blood for thyroid hormones T3 and T4.

  • Save

Providing a more complete picture of thyroid function, this blood test measures the thyroid hormones T3 and T4. The panel is a popular addition to other tests that assess thyroid stimulating hormone (TSH).

Measures free thyroxine (T4), released from the proteins that carry it

  • Save

This test is used to assess your thyroid hormone production. When T4 is released from the proteins that bind and carry it in the blood, it is free to convert to the more active thyroid hormone T3. Some health care providers prefer this test to the standard T4 blood test.

Measures thyroxine (T4), a hormone produced by the thyroid gland

  • Save

This test measures total thyroid hormone production by assessing your level of the thyroid hormone thyroxine (T4). High T4 levels occur in hyperthyroidism, while hypothyroidism is characterized by low T4.

Thyroglobulin antibody blood test helps assess thyroid function

  • Save

If you have symptoms of hypothyroidism, your health practitioner may want to check for antibodies to thyroglobulin, a protein used in the production of thyroid hormones.

Measures triiodothyronine (T3), the active form of thyroid hormone

  • Save

This test evaluates levels of triiodothyronine (T3), a major thyroid hormone, to assess your thyroid function.

Adrenocorticotropic Hormone (ACTH) is a test for pituitary function

  • Save

Adrenocorticotropic hormone (ACTH) is produced by the pituitary gland, which controls the production of cortisol. This blood analysis of ACTH aids in the evaluation of the pituitary gland and disorders characterized by abnormal cortisol levels.

  • Save

Cortisol levels fluctuate from day to night. This test measures morning and late afternoon cortisol values to provide a better assessment of cortisol than just one measurement.

Test assesses 24-hour output of the major adrenal hormone, cortisol

  • Save

This test is the most accurate way to assess cortisol levels, because it measures the amount of this hormone during a 24-hour period.

Measures blood levels of aldosterone, an adrenal gland hormone

  • Save

This test helps health care providers assess for adrenal tumors and specific metabolic conditions by testing levels of the hormone aldosterone.

Measurement of T3 uptake value helps assess thyroid function

  • Save

A test that can be used to screen for thyroid disorders, the T3 Uptake test assesses available binding sites on thyroxine binding globulin, the protein that transports thyroid hormone. This test is often ordered in combination with the Thyroxine (T4) blood test (Item # LC001149).

Measures thyroxine-binding globulin (TBG), which carries T4 and T3

  • Save

If you’ve been undergoing thyroid hormone therapy or are investigating a thyroid disorder, this test will assess your levels of thyroxine-binding globulin, which carries thyroid hormones T3 and T4 in the blood. This test also may be useful in assessing pituitary function.

Can’t sleep? Measure your melatonin and cortisol levels

  • Save

Find out whether you're in shape for a good night's sleep by testing your melatonin and cortisol levels. Melatonin helps regulate the body's internal clock and is needed for deep sleep, but high evening cortisol levels inhibit melatonin production.

Evaluates blood factors that may be altered during stress

  • Save

Take a deep dive into your stress profile. This test assesses stress hormones (cortisol AM/PM, DHEA sulfate), thyroid function (free T3), metabolism markers (glucose, insulin, lipid panel) and also includes a test for the sex hormone progesterone.

Measures the catecholamines epinephrine, norepinephrine, dopamine

  • Save

The adrenal glands make catecholamines as a reaction to stress, which helps the body respond. This panel measures blood levels of the main catecholamines: epinephrine (adrenaline), norepinephrine (noradrenaline) and dopamine.

Essentials Quiz

Answer a few questions to choose the right supplements

Why Life Extension?

100% Satisfaction Guarantee

Full one-year, no-hassle returns, money-back guarantee.

Highly Recommended

98% of our customers recommend us to family and friends. Life Extension is proud to be recognized as the #1 Catalog/Internet Merchant — 6 Time Winner.

Complimentary, Personalized Guidance

Medical doctors, nutritionists & other health professionals are passionate about providing personalized solutions to help you achieve optimal health.

Efficacious Formulas

40 years of research dedicated to bringing you premium, scientifically-validated formulations.

Product Transparency

99% of our products are manufactured in the U.S, and a Certificate of Analysis is available for every product we produce.