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Thyroxine (T4), whose name comes from the fact that it contains 4 molecules of iodine, helps maintain the body's metabolism, temperature, and heart rate. Production of T4 is linked to the production of Thyroid Stimulating Hormone (TSH) by the pituitary gland.
Your blood spot samples will test: Total Thyroxine (T4) levels.
You may want to consider this test if you suffer from:
- Irregular weight gain or loss
- Increased heart rate
- Dry skin
- Hair loss
- Menstrual irregularity in women
Everything you need to collect your sample and return it to the lab is included in the test kit you will receive.
You can review these illustrated Collection Instructions now or wait to receive them in your package.
Your test results will be returned to us within 5 to 7 business days from the date the lab receives your sample. Once we know that your results are available, we will send you an email so that you can login and review them.
NOTE: Per state laws, if you live in California, you will need to email us a prescription from a medical practitioner (could be a physician, physician's assistant, naturopath etc.) in order for us to process your order and send you your test. New York residents may not receive tests per state laws. Having your tests shipped to you outside of California or New York may be the best way to go. (The Air Quality tests and Pet tests do NOT need a prescription and can be sent anywhere needed.)
Because the test kits include postage-paid return shipping, there is an extra shipping charge of $10.00 that will be added to your test order.
Total Thyroxine (T4) Blood Spot Test
This Total Thyroxine (T4) Home Health Test will measure the total Thyroxine, (often referred to as total T4) in your body. The primary thyroid hormone circulating in the blood, T4 is made up of both free T4 as well as protein-bound T4. Total Thyroxine represents the thyroid�s ability to synthesize, process & release T4 into the body. Low levels of T4 are a good indicator of hypothyroidism.
Please note that because return postage is included with this test kit, there is an extra shipping charge of $10. (This extra charge is NOT added to the Canine Health Check Test Kit or Any of the Air Quality Test Kits.
Everything you need to collect your sample and return it to the lab is included. You should receive your results approximately 5 to 7 business days after the lab has received your sample. There are no additional lab or postage fees required after test purchase.
This is a safe, easy to use home blood spot test for men and women of any age.