Your thyroid stimulating hormone (TSH) level indicates how well your thyroid is functioning. For this reason, it's useful to know the TSH normal.
A TSH test is often performed to determine the underlying cause of abnormal thyroid hormone levels. It's also used to screen for an underactive.
The concentration of TSH in circulation is expressed as milli-international units of biological activity per liter of serum (mIU/L). This way of.