ONE SINGLE BLOOD DRAW INCLUDES:
Thyroid Stimulating Hormone (TSH)
TSH causes the thyroid gland to make two hormones, T3 and T4, which help control the body's metabolism. This test is to confirm whether the thyroid gland and brain thyroid communication are working properly.
A measurement of the total amount of T4 (Thyroxine) in the blood.
Most of the T4 in the body binds to protein – any T4 that does not is called 'Free T4' and circulates unbound in blood.
T3 (Triiodothyronine) is the most important thyroid hormone for the body's control of metabolism.
Most of the T3 in the body binds to protein, the T3 that does not is called 'Free T3' and circulates unbound in blood.
Reverse T3 is converted by the liver from the stored hormone T4. It is the body's main route for removing unneeded T4 every day. Sometimes the body can make too much reverse T3 from a number of causes – chronic emotional, physical, or biological stress, chronic sickness, post surgery, diabetes, ageing, or an acute injury.
Thyroid Peroxidase (TPO) Antibody
Thyroid Peroxidase (TPO) is an important enzyme for producing thyroid hormone. TPO converts T4 to T3. High levels of TPO antibodies can indicate the immune system is mistakenly attacking the enzyme and the thyroid gland, which compromises thyroid function.
Thyroglobulin (Tg) Antibody
Thyroglobulin (Tg) is a protein produced and used by the thyroid gland to make the hormones T3 and T4. High levels of antibodies to Tg, also indicate the immune system is mistakenly attacking the thyroid gland.