T3, Total Tri Iodothyronine normal range — check your value
Roughly 80 to 200 ng/dL.
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Your T3, Total Tri Iodothyronine test value
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What T3, Total Tri Iodothyronine measures
All triiodothyronine in blood, both the active free hormone and the portion bound to carrier proteins.
T3, Total Tri Iodothyronine normal range chart
These bands are for female, 31–45 years. Enter your age and gender above to see the bands for you. The table below shows the range for every age and gender.
T3, Total Tri Iodothyronine normal range by age and gender
What a high T3, Total Tri Iodothyronine means, and common causes
Total T3 is above range, which with a low TSH supports an overactive thyroid.
Common causes: Graves' disease, toxic nodule, excess thyroid medication, and raised carrier proteins in pregnancy or on contraceptive pills.
What a low T3, Total Tri Iodothyronine means, and common causes
Total T3 is below range, which in an unwell patient is usually not a thyroid problem at all.
Common causes: Non-thyroidal illness, where any serious illness lowers T3, as well as hypothyroidism and starvation.
Frequently asked questions
Please note. This page explains what a number means against reference ranges for your age and gender. It does not diagnose anything, cannot see the rest of your report, and is no substitute for a doctor. If your lab’s printed range differs, your lab’s range applies.