Why Health Testing Centers?


Purchase your lab tests online or call 1-877-511-LABS (5227) to speak to a nurse and discuss your health concerns. At Health Testing Centers we have one goal: to provide you with the highest quality lab testing that is quick, easy and affordable. No doctor's visit is required, saving you time, money and hassle. Health Testing Centers has been helping patients take control of their health for more than 30 years, offering thousands of comprehensive blood tests, lab tests and STD testing from 1400 locations nationwide.

The thyroid is a butterfly-shape organ that is one of the largest glands in the endocrine system.  The thyroid, like other endocrine glands, secretes several hormones into the blood.  The main hormones produced by the thyroid are thyroxine (T4) and triiodothyronine (T3), collectively called the thyroid hormones.  These hormones control the rate of metabolism or how quickly the body uses energy.  Thyroid hormones also affect many other systems throughout the body including growth and development, protein production, hormone sensitivity, and body temperature.

During childhood, sufficient thyroid hormone levels are critical for normal brain development.  The thyroid gland is located on the front of the neck below the Adam’s apple (laryngeal prominence).  When the thyroid is functioning normally and is normal size, you should not be able to feel it.
Hyperthyroidism (overactive thyroid) and hypothyroidism (underactive thyroid) are the most common conditions involving the thyroid gland.

Thyroid Conditions

Hyperthyroidism: Too much thyroid hormone production. Hyperthyroidism can dramatically increase your body’s metabolism, causing weight loss, increased or irregular heartbeat, nervousness or irritability, and sweating.  Hyperthyroidism is often caused by an overactive thyroid gland or Graves disease, where the immune system mistakenly attacks the thyroid causing it to overproduce thyroxine.
Hypothyroidism:  Too low thyroid hormone production. Having too low a level of thyroid hormone can affect your whole body, making you feel weak, tired or depressed.  A person of  any age can get hypothyroidism, but older adults have the highest risk.  Hypothyroidism is most often caused by an autoimmune disease that attacks the thyroid.
Goiter:  Refers to swelling of the thyroid gland.  Goiters are usually painless and treatment depends on the size, symptoms, and underlying cause.
Thyroiditis:  Chronic inflammation of the thyroid gland, usually caused by an autoimmune disease where white blood cells mistakenly attack healthy thyroid cells.   Thyroiditis can occur at any age, but is most common in middle-aged women.
Graves disease:  An autoimmune disease in which the thyroid is mistakenly attacked by the immune system and overstimulated, causing hyperthyroidism.
Thyroid nodule:  Abnormal growths in the thyroid gland.  Thyroid nodules are fairly common and generally harmless, with only a small percentage being cancerous.
Thyroid cancer:  A disease where abnormal cells grow in the thyroid gland.  Thyroid cancer is a fairly uncommon form of cancer that is usually found early and responds well to treatments.
Thyroid storm:  Extremely high levels of thyroid hormone can cause this rare but extremely serious condition.  One sign that differentiates thyroid storm from hyperthyroidism is a extreme  elevation in body temperature.

Why Have A Thyroid Profile (T3T4T7)

For those that suspect thyroid problems are the culprit of their ailments, a Thyroid Profile T3T4T7 blood test is one that is useful. Blood testing the thyroid can uncover many issues that can lead to a number of medical conditions ranging from problems with metabolism, fatigue and general feelings of poor health. This blood test is commonly ordered for individuals with suspected hyperthyroidism, hypothyroidism, thyroid cancer and as a screening in newborns. This blood testing is also commonly used to monitor the levels of hormones in those individuals that are on thyroid supplements.

Normal Blood Tests Range

Though each lab has different measurements the average ranges for this blood test is as follows:

T3 (tri-iodothyronine) ranges from 36.0 to 40.0. An increased level may be suggestive of hyperthyroidism, thyrotoxicosis, hypoproteinemia, nephrosis or neoplasm. Decreased levels of the T3 might suggest pregnancy, hypothyroidism or that the patient is taking birth control pills.

T4 (tetra-iodothyronine) ranges from 7.0 to 9.0. An increased level on the results of the blood test might suggest hyperthyroidism, thyrotoxicosis, or pregnancy. A decreased level might suggest hypothyroidism, myxedema, nephrosis or simmonds disease.

T7 (FTI or free thyroid index) ranges from 2.6 to 3.6.

A Good Screening

Many physicians make the Thyroid blood tests a part of their patients annual checkup. Thryorid problems can be present at any age and can be treated through medication, diet and other medical procedures. It is important to have the Thyroid Profile (T3T4T7) blood test if you have weight gain or loss, feel run down, puffiness around the eyes, aches in the joints or hands, have trouble getting pregnant or feelings of depression.

Thyroid Stimulating Hormone (TSH)

A Thyroid stimulating hormone (TSH) is a common blood test that is ordered when an individual is suspected of having thyroid troubles. TSH is made in the pituitary gland and stimulates the production of other hormones that help the body with metabolism. As one might suspect the metabolism is very important in the controlling of weight, mood and even growth of the individual.

Why The TSH Test Is Performed

The TSH blood testing may be done when a person is experiencing symptoms of weight loss, weight gain, irregular menstrual cycles, tiredness, feelings of extreme hot or cold, rapid heart rate along with many others. The level of TSH monitored with the blood testing should be in the range of .5 to 5.0. Levels detailed by the blood tests that are abnormally higher or lower can signify medical conditions that should be treated or further diagnosed. An underactive thyroid gland is oftentimes referred to as hypothyroidism and causes weight gain, dry skin, constipation, tiredness and abnormal menstrual cycles. An overactive thyroid is known as hyperthyroidism and can lead to weight loss, abnormal menstrual cycles, increased heart rate and diarrhea.

The TSH blood test can detail the hormones levels in the blood stream and allow individuals to undergo more testing to determine the cause of the thyroids abnormal functioning. There are medications, as well as other treatments for overactive and underactive thyroids making the prognosis good for poor results detailed with the blood test. TSH blood tests are also important for children as the levels are imperative to their development, for both physical and cognitive growth.