Free T4 (fT4)

Free Thyroxine (fT4) is another key thyroid hormone, essential for metabolism, brain development, and bone health. It acts as a precursor for fT3. Measuring fT4 helps assess thyroid function, as it shows the hormone directly produced by the thyroid gland and available for conversion to fT3....

Free T4 (fT4)

Who would benefit from testing their fT4 levels?

Testing fT4 is beneficial for those with thyroid dysfunction symptoms or those undergoing thyroid treatment. It’s also advised for patients with pituitary gland disorders.

What are symptoms of low or high fT4?

Imbalances in fT4 can lead to symptoms like fatigue, depression, weight changes, hair loss, and changes in heart rate or body temperature.

Why is free T4 crucial in thyroid function evaluation?

Free T4 is crucial as it represents the hormone directly produced by the thyroid, impacting bodily functions. Its levels help diagnose thyroid conditions and guide treatment decisions.

What do high or low free T4 levels mean for health?

High fT4 levels may indicate hyperthyroidism, causing symptoms like anxiety and weight loss. Low fT4 levels can point to hypothyroidism, leading to fatigue and weight gain.

Test(s) that measure/test for Free T4 (fT4)

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