Is T3 Uptake the same as free T3?
The T3 uptake test, also called the T3 resin uptake test, indirectly measures the binding capacity of TBG. It does not measure T3, despite the name [2]. TBG, short for thyroxine-binding globulin, is a protein that can bind to T4 and T3.
What is normal for T3 free?
Normal Results The range for normal values are: Total T3 — 60 to 180 nanograms per deciliter (ng/dL), or 0.92 to 2.76 nanomoles per liter (nmol/L) Free T3 — 130 to 450 picgrams per deciliter (pg/dL), or 2.0 to 7.0 picomoles per liter (pmol/L)
What is a T3 uptake level?
A T3 resin uptake, also known as a T3RU, is a blood test that measures the binding capacity of a hormone called thyroxin-binding globulin (TBG). If your T3 level is elevated, your TBG binding capacity should be low.
What does it mean when T3 uptake is high?
If your results show high total T3 levels or high free T3 levels, it may mean you have hyperthyroidism. Low T3 levels may mean you have hypothyroidism, a condition in which your body doesn’t make enough thyroid hormone. T3 test results are often compared with T4 and TSH test results to help diagnose thyroid disease.
What is free T3 Uptake?
A T3 resin uptake (also called a T3 uptake or T3RU) is a blood test performed as part of an evaluation of thyroid function. The thyroid is a gland in the neck that produces the hormones that help regulate many body processes, including growth, energy balance, body temperature, and heart rate.
What is free T3 and bound T3?
Hyperthyroidism means the thyroid gland makes too many thyroid hormones. T3 has 2 forms: bound and free. Bound T3 is attached to a protein and free T3 is not attached to anything. The free T-3 test measures only the amount of free T3. The total T3 test measures both free and bound T3 in your blood.
Is free T3 2.7 Low?
I have found that a free T3 level of less than 2.7 pmol/L is significant and that supplementation makes a difference. A free T4 level of less than 1.0 ng/dL with a corresponding free T3 level of less than 2.8 pmol/L is significant enough to treat, and I have not been disappointed in the results of treatment.
What does a T3 uptake test show?
The T3 resin uptake (T3RU) test is a test of thyroid-related proteins in the blood. It’s used to help healthcare providers interpret the results of other thyroid tests, namely the T3 and T4 tests, which show how much thyroid hormone is available to the body in free form.
Is T3 Uptake important?
What is more important free T3 or T4?
Because T4 is converted into another thyroid hormone called T3 (triiodothyronine), free T4 is the more important hormone to measure. Any changes show up in T4 first. T3 and T4 help to control how your body stores and uses energy (metabolism). The thyroid hormones also help control many of your body’s other processes.
What is the normal range for T3 free?
The normal range for free T3 is 1.5-4.1 pg/ml and your fT3 value of 2.2 is normal. Laboratory reference ranges and normal ranges can differ from lab to lab.If the normal range of your lab shows free T3 2.2 as a low value in other labs this is a normal value.
How much T3 should I take?
Cytomel (T3) Dosage. The human body naturally endogenously manufactures a T3 dosage of approximately 30mcg per day . Hence, this is why many users who wish to ‘play it safe’ by starting off at a Cytomel dosage of 25mcg per day are actually taking a step backwards in progress rather than moving forwards.
What is normal T3 uptake?
The range for normal values are: Total T3 — 60 to 180 nanograms per deciliter (ng/dL), or 0.92 to 2.76 nanomoles per liter (nmol/L) Free T3 — 130 to 450 picgrams per deciliter (pg/dL), or 2.0 to 7.0 picomoles per liter (pmol/L)
Is high T3 a sign of reverse T3?
Reverse T3 is sort of a hibernation hormone, in times of stress and chronic illness, it lowers your metabolism. Many people will have normal thyroid lab tests, but if they have high Reverse T3, they will feel like they have hypothyroidism . Lab Reference Range: 8-25 ng/dL