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www.thyroid.org/thyroid-function-tests

The finding of an elevated TSH and low FT4 or FTI indicates primary hypothyroidism due to disease in the thyroid gland. A low TSH and low FT4 or FTI indicates ...

www.healthline.com/health/hypothyroidism/symptoms-treatments-more

Blood tests are the only way to reliably confirm a diagnosis of hypothyroidism. A thyroid-stimulating hormone (TSH) test measures how much TSH your ...

www.healthline.com/nutrition/hypothyroidism-symptoms

Mar 8, 2017 ... This is known as primary hypothyroidism, as the problem begins at the level of the thyroid gland. Other times, TSH levels decrease, and the ...

www.health.harvard.edu/womens-health/do-you-need-a-thyroid-test

A blood test for levels of TSH is the most sensitive test for determining whether you have hypothyroidism. Most laboratories use 0.45 – 5.00 mIU/L as a ...

www.btf-thyroid.org/thyroid-function-tests

Sep 11, 2019 ... You will normally have less frequent tests when you are stable on your treatment. In hypothyroidism, a TSH test once a year will check that ...

thriva.co/hub/thyroid/how-to-test-your-thyroid-function

The normal range for TSH is: ... If these levels are low, it could indicate an overactive thyroid. If these levels are raised, it could indicate an underactive ...

www.uptodate.com/contents/hypothyroidism-underactive-thyroid-beyond-the-basics

Apr 20, 2021 ... Many patients with mild hypothyroidism are identified on screening tests for potential hypothyroid symptoms but have few or no symptoms that ...

www.verywellhealth.com/understanding-thyroid-blood-tests-low-or-high-tsh-3233198

Oct 24, 2021 ... TSH test results can be confusing. A high TSH level points to hypothyroidism (underactive thyroid). A low TSH might mean hyperthyroidism ...

www.everydayhealth.com/hs/healthy-living-with-hypothyroidism/understanding-test-results

Jan 30, 2020 ... The American Thyroid Association recommends that you keep your TSH within a narrow range of 0.5 to 2.5 mU/L, but don't be alarmed if your test ...

www.bupa.co.uk/health-information/heart-blood-circulation/underactive-thyroid

Symptoms of underactive thyroid · putting on weight · having less of an appetite for food · feeling the cold · dry skin · feeling weak and tired ...

www.mayoclinic.org/diseases-conditions/hypothyroidism/diagnosis-treatment/drc-20350289

Nov 19, 2020 ... Diagnosis of hypothyroidism is based on your symptoms and the results of blood tests that measure the level of TSH and sometimes the level of ...