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T4

Thyroxine (T4) is the main hormone that is created by the thyroid gland, and it is vital in helping to regulate the body’s use and distribution of energy. Millions of Americans currently live with undiagnosed or under-treated thyroid conditions, and the health ramifications of ignoring this important bodily function can be disastrous. Our affordable, confidential, and convenient T4 blood tests can help you and your doctor to uncover the true working condition of your thyroid gland.


The T4 test will deliver a result that is measured in micrograms per deciliter. The normal range for a T4 test is between 4.5 and 11.2 mcg/dL, so any variance to this range may indicate other serious health concerns. A T4 level that is higher than normal may indicate one of the following ailments:
• Graves’ disease – this autoimmune condition most commonly affects the thyroid and can cause it to enlarge to more than double its size or more. The related hyperthyroid symptoms can include rapid heartbeat, general weakness and fatigue, irritability, and upset sleep patterns. Women are more than eight times more likely to suffer from this disease than are men.
• Germ cell tumors – these growths are neoplasms that are derived from germ cells. They can take on two forms – cancerous or non-cancerous, and the tumors can originate as birth defects among newborns.
• Toxic nodular goiters – these involve an enlarged thyroid gland, and the actual nodule may be producing far too much of the thyroid hormone. High levels of iodine in medicinal intake can lead to toxic nodular goiters, as can iodine intake due to CT scans or other screening procedures. Fatigue, muscle cramps, and heat intolerance are common side effects.
• Over treatment with thyroid medication. The T4 levels are a good indicator of whether the patient is taking an appropriate dose of thyroid-regulating medication.


If the T4 test comes back with levels that are below the normal range, this will indicate hypothyroidism – a test result that may include one of several related diseases that involve an underactive thyroid. General illness is a contributing factor of a low T4 count, as is fasting, malnutrition, or the use of some medicines.
If you are in need of a T4 blood test to ensure proper functioning of your thyroid gland, simply order one of our test kits today. Once you receive your kit you can make an appointment at one of the labs listed on our site. You’ll easily find a laboratory that is near your home or work, so you’ll be able to complete your test in no time. And, with prices that are far lower than you’d expect to pay through your doctor’s office, you’ll enjoy quick and affordable results for all of your thyroid testing. Don’t be one of the literally millions of individuals who live with a hypo or hyperactive thyroid. The health risks are real, and the treatment is often quite simple and non-invasive. Help your healthcare professional to analyze your thyroid – quickly and affordably, with a T4 blood test kit from Walk-In Lab.

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