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Learn how to interpret thyroid tests, including TSH, free T4, and free T3, and what they mean for your thyroid function. Find out the normal, low, and high ranges of TSH levels by age and...
Normal thyroid-stimulating hormone (TSH) levels generally fall between 0.4 and 4.5 milliunits per liter (mU/L). 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).
Learn how to interpret your thyroid blood test results, including TSH, T4, T3, and other hormones and antibodies. Find out what the normal ranges are and what they mean for your thyroid health.
A recent study suggests that the normal range should be more like 0.45 to 4.12 mU/L. TSH can vary wildly based on your age, sex, and stage of life. For example, a 29-year-old woman may...
Learn about the normal range of TSH levels by age, sex, and pregnancy status, and what high or low levels indicate. Find out how to measure TSH levels and how to treat thyroid...
Learn about the different tests to measure thyroid hormones, such as TSH, T4, T3, and reverse T3, and how they help diagnose thyroid problems. Find out how thyroid antibodies, thyroglobulin, and iodine uptake tests can also be useful in some cases.
In most cases, irregular thyroid-stimulating hormone (TSH) levels mean there’s an issue with your thyroid — it’s either producing too much thyroid hormone or too little. The good news is that your thyroid hormone levels, and TSH levels, can be corrected with treatment and medication.
Learn how blood tests can diagnose and manage thyroid disorders, such as hypothyroidism and hyperthyroidism. Find out the reference ranges for TSH, FT4, FT3 and thyroid antibodies, and what they mean for your thyroid health.
Learn about thyroid hormone, TSH, T4 and T3 tests, and how to interpret normal ranges for different age groups. Find out how thyroid function can be affected by medications, pregnancy, and other factors.
A T4 test measures thyroxine, a thyroid hormone, in your blood. It helps diagnose thyroid conditions and monitor treatment. Learn about T4 levels, normal ranges and how to prepare for the test.