(Diff normal values exist with age & sex, please confirm from the product insert)
i-Chroma TSH (Thyroid Stimulating Hormone)
Under the influence of TSH, the thyroid will manufacture and secrete T3 and T4 thereby raising their blood levels. When there is a high level of thyroid hormone in the blood, less TRH is released by the hypothalamus, so less TSH is secreted by the pituitary. The opposite action will occur when there are decreased levels of thyroid hormones in the blood. This process, known as a negative feedback mechanism, is responsible for maintaining the proper blood levels of these hormones.