|
T3 (Triiodothyronine) and T4 (Thyroxine) Two important hormones, Triiodothyronine (T3) and Thyroxine (T4) are produced by your thyroid gland. Too much T3 and T4 can result in a condition known as hyperthyroidism and too little T3 and T4 can result in hypothroidism. Symptoms of hyperthyroidism include fatigue, anxiety, sudden weight loss, rapid heartbeat, irritability, more frequent bowel movements, difficulty sleeping, sweating and tremors. Symptoms of hypothyroidism include tiredness, weight gain, constipation, depression, sleepiness, memory loss, decreased sex drive and more. |
| Thyroid
Stimulating Hormone (TSH) A hormone called Thyroid Stimulating Hormone (TSH) regulates your thyroid gland. Thyroid Stimulating Hormone test is a good indicator how your thyroid gland is functioning. Hyperthyroidism usually causes a decreased Thyroid Stimulating Hormone (TSH) level, while hypothyroidism usually (but not always) results in elevated thyroid stimulating hormone (TSH) level. |
|
Thyroxine Binding Globulin (TBG) Thyroxine Binding Globulin is a protein that carries thyroxine (T4) in the bloodstream. The most common causes of low Thyroxine Binding Globulin levels are, familial trait, chronic liver disease, nephrotic syndrome (a form of kidney disease), serious systemic diseases, and drugs such as steroids, androgens and large doses of aspirin. The most common causes for an increased Thyroxine Binding Globulin level are increased familial trait, estrogen levels, liver disease, and drugs such as tamoxifen, perphanazine and methadone. |