0.4 milliunits per liter (mU/L) to 4.0 mU/L. Between 0.5 to 5.
A blood test can measure how much free T4 is available. Hypothyroidism Tests: A Measure of Treatment Success. Hypothyroidism is treated with daily medication. Taking synthetic thyroid hormone medication can bring your T4 and TSH levels back to their normal ranges. What’s normal can vary, depending on a number of factors, including the laboratory where your blood test is done, she adds. A normal range for TSH in most laboratories is 0.4 milliunits per liter (mU/L) to 4.0 mU/L. TSH Normal Range. The amount of measurement of thyroid stimulating hormone (TSH) in blood is done by a laboratory blood test called a TSH test. The pituitary gland produces TSH (or thyroid stimulating hormone). In general, it modulates the thyroid gland to produce and secrete thyroid hormones into the blood. The official normal range of TSH followed by many doctors and laboratories until 2002 was from between 0.5 to 5. According to this TSH range, a TSH over 5 indicated an under active thyroid (or hypothyroidism); while a low TSH value below0.5 indicated an overactive thyroid or (hyperthyroidism). Thyroid-stimulating hormone (also known as thyrotropin, TSH, or hTSH for human TSH) is a pituitary hormone that stimulates the thyroid gland to produce thyroxine (T 4), and then triiodothyronine (T 3) which stimulates the metabolism of almost every tissue in the body. Elevated reverse T 3 (RT 3) together with low-normal TSH and low-normal T 3, T 4 values, which is regarded as indicative for euthyroid sick syndrome, may also have to be investigated for chronic subacute thyroiditis (SAT) with output of subpotent hormones. Results. A thyroid-stimulating hormone (TSH) blood test is used to check for thyroid gland problems. The normal values listed here-called a reference range-are just a guide. These ranges vary from lab to lab, and your lab may have a different range for what's normal 1 When the hormone levels are low, the brain sends a message to send out TSH. 2  This causes the thyroid gland to send out more hormones. 3  If blood levels of thyroid hormone are high, the brain senses this and sends a message to stop producing TSH. 4  TSH is a very good test to check for hypothyroidism.  Normal TSH Values. The normal range of TSH test report can range from between 0.4 – 4.0 milli-international units per liter. The TSH value depends on various factors like lab reports, related symptoms and treatment for the condition. The official normal range of TSH followed by many doctors and laboratories until 2002 was from between 0.5 to 5. According to this TSH range, a TSH over 5 indicated an under active thyroid (or hypothyroidism); while a low TSH value below0.5 indicated an overactive thyroid or (hyperthyroidism). This leads to high levels of TSH and low levels of free T4. If your free T4 levels are too low—the normal range for T4 is 5 to 13.5 micrograms per deciliter—it's a possible indicator that you have hypothyroidism, even if your previous TSH tests came back normal. Again, the normal ranges vary from lab to lab. Anti-thyroid Microsomal Antibodies Testing. TSH Testing. In diagnosing hypothyroidism, your doctor will take into account both your symptoms and the results of a thyroid stimulating hormone (TSH) test. In essence, hypothyroidism is the result of diminished levels of thyroid hormones—known as T3 and T4. If you’re making too much thyroid hormone, your TSH will go down.”. What’s normal can vary, depending on a number of factors, including the laboratory where your blood test is done, she adds. A normal range for TSH in most laboratories is 0.4 milliunits per liter (mU/L) to 4.0 mU/L. If your TSH is higher than 4.0 mU/L on repeat tests, you probably have hypothyroidism
http://www.everydayhealth.com/hs/healthy-living-with-hypothyroidism/understanding-test-results/ http://hyperthyroidismsymptomsx.com/TSH-Normal-Range https://en.wikipedia.org/wiki/Thyroid-stimulating_hormone http://www.webmd.com/women/thyroid-stimulating-hormone-tsh?page=2 http://my.clevelandclinic.org/services/heart/diagnostics-testing/laboratory-tests/thyroid-blood-tests http://hyperthyroidismsymptomsx.com/TSH-Normal-Range http://www.endocrineweb.com/conditions/hypothyroidism/hypothyroidism-diagnosis http://www.everydayhealth.com/hs/healthy-living-with-hypothyroidism/understanding-test-results/
tsh blood test normal range