• TSH - Thyroid Stimulating Hormone
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TSH - Thyroid Stimulating Hormone

TSH - Thyroid Stimulating Hormone

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The TSH (Thyroid Stimulating Hormone) test measures the level of thyroid-stimulating hormone in your blood, which plays a crucial role in regulating your thyroid gland's function. A properly functioning thyroid is vital for maintaining your metabolism, energy levels, and overall health. Abnormal TSH levels can indicate an underactive (hypothyroidism) or overactive (hyperthyroidism) thyroid, leading to symptoms such as fatigue, weight changes, and mood swings. This simple blood test can help identify thyroid disorders and guide necessary treatment or lifestyle adjustments, making it an essential step in understanding your hormonal health.

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About This Test

Reason to Check It

"Women are five to eight times more likely than men to have thyroid problems. In fact, one woman in eight will develop a thyroid disorder during her lifetime. 

Symptoms of hyperthyroidism include fatigue, anxiety, sudden weight loss, rapid heartbeat, irritability, more frequent bowel movements, difficulty sleeping, sweating and tremors. 

Symptoms of hypothyroidism include weight gain, constipation, depression, sleepiness, memory loss, decreased sex drive and more. An extremely common cause of low energy is hypothyroidism.  In fact, it is often misdiagnosed as depression.

TSH is a good screening test for most thyroid disease.  An optimal TSH is between 0.4 to 2.  Normal TSH can range up to 4. The incidence of thyroid disease has increased in the last several decades. There is concern that the increased use of GMO’s and pesticides has contributed to thyroid disease." - Dr. Alan Hopkins

Test Preparation

  • No special preparation is required before your sample collection.


Please Note: We recommend overnight fasting and an early morning blood draw for all tests, even if no special preparation is required. Remember, it is OK to drink plenty of water. Drinking water helps hydrate you and makes it easier for the phlebotomist to obtain your blood sample.

Test Type and Method

Test Type:

  • Blood


Test Method:

  • In-person Blood Draw

Post-Test Notes

  • Once your specimen is collected, test results are typically processed and available within a few business days. Processing times may vary depending on the test. Your results will be delivered in a clear, easy-to-understand report. If any values fall outside the expected range, you may receive a follow-up call from an independent healthcare coordinator.

Lab Testing is Simple, Fast, and Convenient

Choose the Individual Test or Lab Panel that suits your health needs. You’ll receive your lab requisition within 24 hours. Visit any of the 3,000+ Quest Diagnostics centers using the button below. Once your sample is collected, your results will be securely delivered via email within 7–10 days.

View Quest Draw Locations

Lab Testing is Simple, Fast, and Convenient

Choose the Individual Test or Lab Panel that suits your health needs. You’ll receive your lab requisition within 24 hours. Visit any of the 3,000+ Quest Diagnostics centers using the button below. Once your sample is collected, your results will be securely delivered via email within 7–10 days.

View Quest Draw Locations