If you need to know which are the T3 reference ranges or you require more information about the role of T3 in the blood, you can visit normal T3 level in the blood
Low values of total T3 (Triiodothyronine) in the blood may be a sign of hypothyroidism where the thyroid gland fails to produce enough thyroid hormones.
T3 values in the blood are usually studied along with T4 hormone (thyroxine) and TSH (thyroid-stimulating hormone) values to give a better diagnosis.
There are two types of hypothyroidism:
T3 blood values are usually given in ng/ml but sometimes you can see these values in nmol/l following the International System of Units (SI). In case your values are in nmol/l you can convert them using this tool:
Hypotriiodothyroninemia or low T3 blood levels mean:
T3 level in the blood is below the normal range and it is a sign of suffering from hypothyroidism, a situation that occurs when the thyroid gland does not produce enough thyroid hormones.
T3 should be studied along with TSH (thyroid-stimulating hormone) and T4 (thyroxine) for a better diagnosis. In case it was necessary, your doctor will prescribe you the best treatment.
T4 (thyroxine) and TSH values are more precise to diagnose primary hypothyroidism than T3 values.
An additional test of free T3 in the blood can be asked for your doctor to get more information about the disorder.
If your T3 level in the blood is low, you may suffer from fatigue, depression or weight gain.
Some particular health situation or drugs may reduce your T3 level in the blood:
The following diseases can explain a total T3 level in the blood lower than normal:
If the T3 (Triiodothyronine) level in the blood is low the following tips can help you:
You can visit our pages about:
The following values are considered to be above the normal range:
IMPORTANT: These levels are expressed in ng/ml. They are an example of a healthy man of about 45 years old with no known disease and not taking any medication. The ranges can be different depending on the laboratory or on your personal circumstances.
T3 | |||||||
|---|---|---|---|---|---|---|---|
| Marked hypotriiodothyroninemia | |||||||
| 0.79 ng/ml | 0.78 ng/ml | 0.77 ng/ml | 0.76 ng/ml | 0.75 ng/ml | 0.74 ng/ml | 0.73 ng/ml | 0.72 ng/ml |
| 0.71 ng/ml | 0.7 ng/ml | 0.69 ng/ml | 0.68 ng/ml | 0.67 ng/ml | 0.66 ng/ml | 0.65 ng/ml | 0.64 ng/ml |
| 0.63 ng/ml | 0.62 ng/ml | 0.61 ng/ml | 0.6 ng/ml | 0.59 ng/ml | 0.58 ng/ml | 0.57 ng/ml | 0.56 ng/ml |
| 0.55 ng/ml | 0.54 ng/ml | 0.53 ng/ml | 0.52 ng/ml | 0.51 ng/ml | 0.5 ng/ml | 0.49 ng/ml | 0.48 ng/ml |
| 0.47 ng/ml | 0.46 ng/ml | 0.45 ng/ml | 0.44 ng/ml | 0.43 ng/ml | 0.42 ng/ml | 0.41 ng/ml | 0.4 ng/ml |
| 0.39 ng/ml | 0.38 ng/ml | 0.37 ng/ml | 0.36 ng/ml | 0.35 ng/ml | 0.34 ng/ml | 0.33 ng/ml | 0.32 ng/ml |
| 0.31 ng/ml | 0.3 ng/ml | 0.29 ng/ml | 0.28 ng/ml | 0.27 ng/ml | 0.26 ng/ml | 0.25 ng/ml | 0.24 ng/ml |
| 0.23 ng/ml | 0.22 ng/ml | 0.21 ng/ml | 0.2 ng/ml | 0.19 ng/ml | 0.18 ng/ml | 0.17 ng/ml | 0.16 ng/ml |
| 0.15 ng/ml | 0.14 ng/ml | 0.13 ng/ml | 0.12 ng/ml | 0.11 ng/ml | 0.1 ng/ml | 0.09 ng/ml | 0.08 ng/ml |
| 0.07 ng/ml | 0.06 ng/ml | 0.05 ng/ml | 0.04 ng/ml | 0.03 ng/ml | 0.02 ng/ml | 0.01 ng/ml | 0 ng/ml |
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