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Oct 3, 2022 · In general, normal ranges of free T4 for healthy people include: Children up to 5 years old : 0.8 – 2.8 nanograms per deciliter (ng/dL). Children 6 to 15 years old : 0.8 – 2.1 ng/dL.
Sep 5, 2023 · 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.
Oct 23, 2023 · In adults, normal levels of total T4 range from 5–12 micrograms per deciliter (mcg/dl) of blood. Normal levels of free T4 range from 0.8–1.8 nanograms per deciliter (ng/dl) of...
Oct 3, 2023 · Thyroid Disease. Diagnosis. Reading Your Thyroid Blood Test Results. Interpreting TSH Values and T3/T4 Levels. By Mary Shomon. Updated on October 03, 2023. Medically reviewed by Do-Eun Lee, MD. Print. View All. Thyroid Function. Types of Tests. Interpreting Results. Frequently Asked Questions.
May 17, 2023 · Q: Where can I test my free T4 levels? Your free T4 levels can be tested by your general practitioner or with an at-home test kit. Q: What is the normal range for free T4? Your FT4 values should be between 12.0 - 22.0 pmol/L.
Oct 25, 2019 · Typical results in adults for the free T4 test generally range from 0.8 to 1.8 nanograms per deciliter (ng/dL). Like total T4 in adults, free T4 also varies in children according to...
Normal Range. The normal range for free T4 in adults is 4.6 to 11.2 micrograms per deciliter (mcg/dL). A normal T4 test result means your thyroid gland works like it should. High or Low T4. A high T4 result could mean you have hyperthyroidism. A low T4 test result is a sign of hypothyroidism.
Usually the ‘free’ or active portion of T4 and T3 is measured (i.e., FT4 and FT3). Laboratories use reference ranges to compare blood test results with results in the normal healthy population. Typical reference ranges for healthy adults are:
Free T4, which enters the body tissues where it's needed. Bound T4, which attaches to proteins, preventing it from entering body tissues. A test that measures both free and bound T4 is called a total T4 test. Other tests measure just free T4. A free T4 test is considered more accurate than a total T4 test for checking thyroid function.
The normal range for free T 4 in adults is 0.8 to 1.8 nanograms per deciliter (ng/dL).
