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TSH Blood Test

Eric Randall
From start to finish, how easy & unbelievable pricing. The staff is excellent and efficiency is their motto. Plus if you need help, they are there. I am telling everyone about this awesome find!!! Super big Thank-You!
S Heintz
Absolutely one of the best tests ever! The test I took gave me so much information and made so much sense. I will definitely use this company again! Easy testing and great service!
C.S. Attaway
Dr. Brady was great. Very informative
Karen Weisman
Great Service! I had a billing issue and they took care of it quickly with just one email explaining the problem.
Build-R-US LLC
I have ordered tests a week ago still no results. Customer service phone only let you leave a message .. no response by email ... You get an idea how good they are
Nancy LeMay
TrueHealth is the most cost effective place to get my detailed full-panel thyroid lab tests. The site is easy to use and the customer service is outstanding!
  • Draw Locations
  • Fasting: No
  • Turnaround Time: 2-3 Business Days
  • Not Available in: NY, NJ, MA, and RI
  • HSA and FSA Approved!

$49.00 USD $94.00

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Understanding the TSH Blood Test

The Thyroid-Stimulating Hormone (TSH) blood test is a crucial diagnostic tool used to assess thyroid function. It measures the level of TSH in the bloodstream, which is key in regulating thyroid hormone production. Basically, TSH tells the thyroid to increase its production of thyroid hormone.tsh-blood-test-high-levels

Significance in Medicine and Functional Medicine

In the realm of medicine, the TSH blood test is vital for diagnosing and monitoring thyroid disorders such as hypothyroidism and hyperthyroidism. Functional medicine also emphasizes its importance, considering it an essential marker for assessing overall metabolic health, including mystery symptoms that may seem separate from direct thyroid issues such as gut issues.

Ordering this lab test can be a proactive step in managing your health. It helps in identifying thyroid imbalances that could be the underlying cause of various symptoms like weight fluctuations, mood changes, and energy levels. This test is particularly significant for those with a family history of thyroid issues or those experiencing symptoms indicative of thyroid dysfunction.

The most common reason for high TSH levels is a condition called Hashimotos, an autoimmune condition in which the immune system attacks the thyroid. Knowing if Hashimotos is playing a role in your thyroid situation is critical. Add thyroid antibodies to your order.

Labs Included in Your Order

Test Name Medical Reference Range Description
TSH Blood Test (third-generation) 0.45 to 4.5 mIU/L This test measures the level of thyroid-stimulating hormone in the blood, crucial for thyroid health assessment. Note that Functional Medicine reference ranges are closer (1.8-3.0).

According to the University of Iowa, “The TSH test results can tell you if your thyroid is making too much or too little thyroid. But the test can’t explain why your TSH levels may be too high or too low.”

FAQs About TSH Blood Test

What is this Test For?

The TSH test is primarily used to assess thyroid function, detecting conditions like hypothyroidism or hyperthyroidism.

What Causes Low and High TSH Levels?

High levels typically indicate hypothyroidism (underactive thyroid). There are many reasons for high TSH levels but the most common is autoimmune Hashimotos. Low levels suggest hyperthyroidism (overactive thyroid), which is generally also autoimmune-related (Graves disease).

Signs and Symptoms of Thyroid Issues

Symptoms of thyroid dysfunction vary depending on whether it’s overactive (weight loss, palpitations) or underactive (weight gain, fatigue).

How Often Should I Retest?

Retesting frequency depends on your health condition and doctor’s recommendation, typically ranging from every 6 months to annually. If autoimmune thyroid, at every blood work follow up.

How Accurate is this Test?

The TSH test is a reliable indicator of thyroid function, often used as the first-line screening tool for thyroid issues.

Are There Any Restrictions for This Test?

Yes. If you’re using a supplement that includes biotin, which is also known as vitamin B7, B8, vitamin H, or coenzyme R, and is commonly found in products that promote the health of nails, skin, and hair, it is advisable to refrain from sample collection for a minimum of 72 hours after your last dose.

Are Test Results Private and Confidential?

Lab results are provided securely through your TrueHealthLabs.com results tab under “My Account.” Results may be provided to local, state, or federal health authorities, but only when legally required, as in the case of communicable diseases like STDs or COVID-19. Review our privacy policy for more details.

To learn more, see our comprehensive guide to the TSH Blood Test.


Reviewed by Jeff Donohue M.D. from Body Logic and Brady Hurst DC, CCCN. Written by True Health Labs team of editorial health contributors.

Disclaimer: This information is for educational purposes only and not intended as medical advice. Consult your healthcare provider for personalized guidance.

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