Disclaimer: Humans should consult a doctor before taking medical advice.
Why you should order a Thyroid test.
A Thyroid test in the body includes T4, T3, and TSH. Circulating in the blood, T4 and T3 are bound and link to protein molecules. The unbound T3 and T4 represents the bodys thyroid levels. Thyroid levels of free hormone act as the hormone present to react with receptors of cells in the body.
In hypothyroidism, blood thyroid levels are low.. TSH thyroid levels are increased when the pituitary gland produces and releases more TSH than is needed. A Thyroid test determines hyperthyroidism which is a condition of too much blood thyroid hormone and the hypothalamus mandates the pituitary to cease releasing TSH. Patients with abnormal thyroid levels or thyroid function may have normal TSH levels in beginning stages of dysfunctional thyroid. Due to this, an FT3 and FT4 thyroid level test needs to be performed.
T3 is only produced in small amounts by the thyroid gland. In the liver, the majority of T3 present in the blood is made by conversion of T4 to T3.