Product Specification
Specimen Types |
Plasma/Serum |
Specimen Capacity |
40μL |
Reaction Time |
20 min |
Sample Capacity |
80μL |
Detection Range |
0.4-100μIU/mL |
Clinical Significance
High Levels of TSH
TSH levels typically fall between 0.4 and 4.0 milliunits per liter (mU/L), according to the American Thyroid Association. Ranges between laboratories will vary with the upper limit generally being between 4 to 5. If your level is higher than this, chances are you have an underactive thyroid.
In general, T3 and T4 levels increase in pregnancy and TSH levels decrease.
It's also possible that the test reading comes back showing lower than normal levels of TSH and an overactive thyroid. This could be caused by:
Graves’ disease (your body’s immune system attacks the thyroid)
- Too much iodine in your body
- Too much thyroid hormone medication
- Too much of a natural supplement that contains the thyroid hormone