Thyroid blood tests are an important part of diagnosing and treating thyroid disease. Based on how high or low the different values are—including key hormones such as TSH and T4—the lab can determine ...

Subclinical hyperthyroidism means that a person has low or undetectable levels of thyroid-stimulating hormone (TSH) with normal levels of free thyroid hormones. It usually does not cause symptoms. The ...

A randomized crossover trial evaluated the efficacy of different l-thyroxine dosing strategies and different target thyroid-stimulating hormone (TSH) ranges in patients with treated hypothyroidism.