TSH (thyroid-stimulating hormone) is produced by the pituitary gland and regulates how much thyroid hormone the thyroid gland makes. It is the primary screening test for thyroid function.
Category: Thyroid Panel
Also known as: tsh, thyroid stimulating hormone, thyrotropin
Reference range: 0.4–4 mIU/L (Source: ABIM)
Standard unit: mIU/L
High values may indicate
High TSH may indicate hypothyroidism (underactive thyroid), Hashimoto's thyroiditis, or pituitary tumors that overproduce TSH.
Low values may indicate
Low TSH may indicate hyperthyroidism (overactive thyroid), Graves' disease, excessive thyroid medication, or pituitary gland dysfunction.