What does T4 free indicate?
A level of free T 4 that is higher than normal could mean you have an overactive thyroid. Conditions associated with hyperthyroidism include Graves disease, an autoimmune disorder. Abnormally low free T 4 levels may signal hypothyroidism. This means your thyroid is not making enough hormones.
When should I get my free T4?
When is it ordered? A free T4 test may be ordered when a person has symptoms of hyperthyroidism or hypothyroidism and/or when a person has an enlarged thyroid gland (goiter) or thyroid nodule, particularly if the TSH test is out of range.
What is T4 free normal range?
Normal Results A typical normal range is 0.9 to 2.3 nanograms per deciliter (ng/dL), or 12 to 30 picomoles per liter (pmol/L). Normal value ranges may vary slightly among different laboratories. Some laboratories use different measurements or may test different specimens.
What does high T4 free mean in a blood test?
In general, T4 results that are higher than normal may be a sign of: Hyperthyroidism, which may be caused by Graves disease or another medical condition that causes your thyroid to make too much T4. Thyroiditis (thyroid inflammation) Toxic goiter (an enlarged thyroid with areas that make extra thyroid hormone)
What is normal T4 level in female?
The normal range may vary slightly in different laboratories. Total T4 level: This test measures both protein-bound and free T4. A normal total T4 level in an adult is in the range of 5.0 to 12.0 mcg/dL (microgram/deciliter). High T4 indicates hyperthyroidism and low T4 indicates hypothyroidism.
Which is more important TSH or Free T4?
Across many clinical studies it seems clear that the physiologic effects of low or high thyroid function correlate much more strongly to free T4 and free T3 levels than to TSH levels. In fact, correcting for changes in T4 and T3 levels there appeared to be no correlation between TSH level and body function.