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  2. May 14, 2024 · TSH levels higher than 4.5 mU/L usually indicate an underactive thyroid (hypothyroidism), and low TSH levels—below 0.4 mU/L—indicate an overactive thyroid (hyperthyroidism). However, there are exceptions to these interpretations and variations as to what a "normal" TSH level is.

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  3. Jul 25, 2022 · Thyroid-stimulating hormone (TSH) triggers your thyroid to release its hormones, which mainly impact your body’s metabolism. High TSH levels usually indicate hypothyroidism, and low TSH levels usually indicate hyperthyroidism.

  4. A TSH test is used to find out how well your thyroid is working. It can tell if you have hyperthyroidism (too much thyroid hormone) or hypothyroidism (too little thyroid hormone) in your blood. But a TSH test can't show what is causing a thyroid problem.

  5. Dec 17, 2020 · Purpose. Preparation. Procedure. Results. A thyroid stimulating hormone (TSH) test measures the amount of TSH in the blood. A blood test can measure TSH and help a doctor...

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  6. Jan 24, 2023 · A TSH test measures the level of TSH in your blood. Knowing how much TSH is in your blood can reveal whether your thyroid is working properly. Your healthcare provider can perform a TSH...

  7. Test Details. How do thyroid blood tests work? Thyroid blood tests measure certain hormones and antibodies in your blood. Too many or too few of these hormones or antibodies might mean that you have thyroid disease.

  8. Oct 24, 2023 · Overview. Symptoms. Causes. Treatment. Living With. What Your Hypothyroidism Test Results Mean. A simple, regular blood test is used to guide treatment for hypothyroidism and monitor the...

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