Thyroxine (T4), Free, Direct (Free T4) LabCorp

Cold intolerance: Low thyroid hormone levels, which this test measures, can slow down your metabolism and make you feel cold.
Constipation: Thyroid hormones help regulate digestion, and low levels can lead to slowed bowel movements.
Dry skin: Thyroid function impacts skin health, and imbalances can result in dry, flaky skin.
Fatigue: This test helps check if low thyroid hormone levels are causing your persistent tiredness.
Hair loss: Thyroid hormones are important for hair growth, and imbalances can contribute to hair thinning or loss.
Weight gain: This test can help determine if your thyroid is contributing to unexplained weight gain by affecting your metabolism.

$30.00

This test measures the total amount of thyroid hormone T4 (thyroxine) in the blood, which can help identify a thyroid disorder.

LabCorp Test #: 001974, CPT: 84439

Disclaimer: Due to state regulations, Defy Medical does not offer on-demand lab testing in New York, New Jersey, Pennsylvania, Rhode Island, or Massachusetts.

Details

This test measures the amount of free thyroxine, a hormone made by your thyroid gland, in your blood. Free T4 is the active form of the hormone that affects your body's metabolism. It helps diagnose thyroid conditions like hyperthyroidism or hypothyroidism.

Product Instructions & Info

More Information
Why To Buy	This Free T4 test checks your thyroid hormone levels, which can help identify if your thyroid gland isn't working correctly, potentially causing your symptoms. Understanding your thyroid function is key to finding the cause of issues like fatigue and weight changes. Defy Medical offers this test to help you get answers and feel better. Finding the cause(s) of: Cold intolerance: Low thyroid hormone levels, which this test measures, can slow down your metabolism and make you feel cold. Constipation: Thyroid hormones help regulate digestion, and low levels can lead to slowed bowel movements. Dry skin: Thyroid function impacts skin health, and imbalances can result in dry, flaky skin. Fatigue: This test helps check if low thyroid hormone levels are causing your persistent tiredness. Hair loss: Thyroid hormones are important for hair growth, and imbalances can contribute to hair thinning or loss. Weight gain: This test can help determine if your thyroid is contributing to unexplained weight gain by affecting your metabolism.
Symptoms	Cold intolerance, Constipation, Dry skin, Fatigue, Hair loss, Weight gain