Medically reviewed by Kelly Wood, MD If you have hypothyroidism with normal TSH levels, you may still experience symptoms ...

Medically reviewed by Isabel Casimiro, MD, PhD A TSH test measures the level of thyroid-stimulating hormone in your blood.

Early symptoms can include weight gain and fatigue ... If you have hyperthyroidism, your TSH levels will be low, as your body is trying to stop excessive thyroid hormone production.

Modern-day TSH methods however, with their enhanced sensitivity are also capable of detecting the low TSH values typical of hyperthyroidism. These new methods are often based on non-isotopic ...

Many physicians use a serum TSH target value of 0.05-0.1 mIU/L for low-risk patients and a TSH of <0.01 mIU/L for high-risk patients. Some physicians use a low-normal range therapeutic target for ...