Please Wait
{{vm.model.title}}
{{vm.model.overview}}
Recommended Products for You
Tri-iodothyronine (T3) Free Blood Test
Item # LC010389
Measures the most active thyroid hormone, unbound (free) T3
Tri-iodothyronine (T3) Free Blood Test
Item # LC010389
Measures the most active thyroid hormone, unbound (free) T3
Triiodothyronine (T3) is a major thyroid hormone. This test measures the amount of T3 available to the tissues, or free T3. Many doctors believe that evaluating the levels of free T3 is the best way to assess your thyroid function.
| This test measures the amount of T3 available to the tissues, or free T3. Many doctors believe that evaluating the levels of free T3 is the best indicator of thyroid function. Hypothyroidism is a condition where T3 blood levels are low. This causes cellular dysfunction and metabolic breakdown. Symptoms may include weight gain, constipation, dry skin, and hair loss. Low T3 levels may even lead to the development of chronic diseases such as heart disease and diabetes. Hyperthyroidism is the term for elevated T3 blood levels. Symptoms can include anxiety, insomnia, heart palpitations, and bowel discomfort. Instructions Fasting is not required for this test. Take all medications as prescribed. Note For a more extensive evaluation of thyroid function, Life Extension® offers a Comprehensive Thyroid Panel. |
The laboratory services are for informational purposes only. It is not the intention of National Diagnostics, Inc and Life Extension to provide specific medical advice but rather to provide users with information to better understand their health. Specific medical advice including diagnosis and treatment will not be provided. Always seek the advice of a trained health professional for medical advice, diagnosis or treatment.
Both the physician and the testing laboratory are independent contractors with whom National Diagnostics, Inc makes arrangements for your blood tests. Neither National Diagnostics, Inc or Life Extension will be liable for any acts or omissions of the physician, the testing laboratory, or their agents or employees.
A clinician's order is required for many tests. Where applicable, an independent clinician will review your test request and determine whether to authorize the test, if appropriate. For additional information, see PWNHealth Terms of Service.
Life Extension - Why We Do It?
The Best Supplements Science Can Offer
When putting something in your body, you should be confident that you’re getting the nutritional benefits your body deserves. We've been delivering high-quality, science-backed supplements for more than 40 years.
What Matters to You, Matters to Us
We're committed to empowering you to live a healthier life. Whether it’s finding sustainable partners for our ingredients or funding the latest anti-aging research, we're all about your health & wellness.
Highly Recommended
98% of our customers recommend us to family and friends. We're very proud of that because our loved ones matter to us—and we're willing to bet you feel the same way.
Product Transparency
40 years of research dedicated to bringing you premium, scientifically-validated formulations.
Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of Life Extension. We do not verify or endorse any claims made in these reviews.
Related Lab Test
Thyroid Panel (TSH, T4, Free T4, Free T3) Blood Test
Thyroid markers for insight into your thyroid
$75.00
