2022年10月3日 · TSH is a hormone your pituitary gland makes. It stimulates your thyroid to produce T4 and T3 (triiodothyronine) hormones. A TSH test is the best way to initially assess thyroid function. In fact, T4 tests more accurately reflect thyroid function when combined with a TSH test. Measuring T4 levels might not be necessary in all thyroid conditions.

2025年3月21日 · Normal thyroid-stimulating hormone (TSH) levels generally fall between 0.5 and 5.0 milliunits per liter (mU/L). If your TSH level is higher than 5.0 mU/L it suggests an underactive thyroid, or hypothyroidism, since TSH regulates hormone production.

2024年10月11日 · Thyroid function is commonly assessed through thyroid-stimulating hormone (TSH) testing, as TSH is widely considered the most accurate biomarker for screening thyroid health. Elevated or suppressed TSH levels can signal potential thyroid dysfunction, such as hypothyroidism or hyperthyroidism.

2023年9月5日 · Tests measuring free T4 – either a free T4 (FT4) or free T4 index (FTI) – more accurately reflect how the thyroid gland is functioning when checked with a TSH. The finding of an elevated TSH and low FT4 or FTI indicates primary hypothyroidism due to …

2022年12月10日 · If the results show that TSH is high and T-4 is low, then the diagnosis is hypothyroidism. In some cases, the thyroid hormone T-3 may be measured as well. If the second test shows high TSH but T-4 and T-3 are in the standard range, then the diagnosis is a condition called subclinical hypothyroidism.

2023年12月22日 · The thyroid-stimulating hormone (TSH) test measures the amount of TSH in the blood to convey how well a person’s thyroid functions. Normal levels are typically 0.4 to 4.0 milliunits per...

2021年5月15日 · Diagnosis is based on blood levels of decreased FT 4, with a corresponding elevated thyrotropin (i.e., TSH) level in primary causes (thyroid source); the TSH level may be normal to low in ...

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.

2023年11月14日 · TSH triggers your thyroid to make a hormone called thyroxine (T4). Once released into your blood, T4 is turned into another, more potent hormone called triiodothyronine (T3). “Thyroid hormone ...

2025年3月9日 · Are you experiencing a high TSH but normal T4? Are you confused about interpreting these values? Is your Doctor telling you that your tests are normal even though you are experiencing abnormal symptoms? This article will help shed light on this thyroid lab pattern and help you understand what it means.