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Some research suggests that this range should actually be more like 0.45 to 2.5 mIU/L. The TSH range may also vary slightly based on the testing facility where your blood is being analyzed. TSH ...
These blood tests measure the amount of proteins that can bind to T3 and T4. They can help determine the cause of a thyroid problem if your thyroid gland is functioning normally. The tests include: Thyroid binding globulin (TBG): This is the specific protein that binds to T4 and T3. T3 resin uptake (T3RU): This calculates the percentage of TBG ...
TSH levels higher than 4.5 mU/L usually indicate an underactive thyroid (hypothyroidism), and low TSH levels—below 0.4 mU/L—indicate an overactive thyroid (hyperthyroidism). However, there are exceptions to these interpretations and variations as to what a "normal" TSH level is. This is because TSH levels can vary by age, male and female ...
This thyroid test analyzer will help you understand your TSH, T3, T4, and other thyroid function test results. Select a test and enter your lab value to learn more. “This tool is aimed to help you interpret your thyroid function test in order to clarify your diagnosis or track the progression of treatment. Please make sure you discuss with ...
If your Free T3 level is high in your thyroid test results, it indicates that your thyroid is overactive or hyperthyroidism. If your Free T3 is low in your thyroid test results, you may not be converting T4 to Free T3 very well. You could have hypothyroid symptoms, even if your TSH level and Free T4 level are within the “normal” range in ...
Tests measuring free T4 – either a free T4 (FT4) or free T4 index (FTI) – more accurately reflect how the thyroid gland is functioning when checked with a TSH. The finding of an elevated TSH and low FT4 or FTI indicates primary hypothyroidism due to disease in the thyroid gland. A low TSH and low FT4 or FTI indicates hypothyroidism due to a ...
Total T4 and Total T3 levels measure bound and free thyroid hormone in the blood. These levels are influenced by many factors that affect protein levels in the body, including medications, sex hormones, and liver disease. A normal Total T4 level in adults ranges from 5.0 to 12.0μg/dL. A normal Total T3 level in adults ranges from 80-220 ng/dL.