Thyroxine Free T4 Range. If your free thyroxine level is more than the normal range, it may result in hyperthyroidism whereas a lower level of free thyroxine level can result in hypothyroidism. About the t4 blood test.
Free thyroxine, ft4, measurement of free t4, in combination with tsh is used to diagnose and monitor thyroid disorders. Your body makes two different t4 hormones. If you recall from basic thyroid physiology, your free t4 levels act as a reservoir or pool to draw upon when your body needs to create the active thyroid hormone free t3.
If your results show a low total t4 or a low free t4 index, it indicates a.
If your free thyroxine level is more than the normal range, it may result in hyperthyroidism whereas a lower level of free thyroxine level can result in hypothyroidism. In most cases, free thyroxine (also known as free t4) is good indicator of thyroid function, along with tsh and other measures. Free thyroxine is often more useful than total thyroxine (total t4) in assessing thyroid function, but total t4 can be a useful biomarker in some cases. If your results appear as high total t4 or a high free t4 index, it indicates you might be experiencing from hyperthyroidism.