Medically reviewed by Isabel Casimiro, MD, PhD A TSH test measures the level of thyroid-stimulating hormone in your blood. Abnormal TSH levels typically indicate a problem with your thyroid, like ...

Triiodothyronine, or T3, is an important thyroid hormone that helps maintain muscle control, brain function and development, heart and digestive functions. High or low T3 levels may indicate an ...

The thyroid gland covers the windpipe from three sides. Two hormones of the thyroid gland, T4 (thyroxine) and T3 (triiodothyronine), help the body to produce and regulate the hormones adrenaline ...