Thyroid Stimulating Hormone

This add-on measures the level of thyroid stimulating hormone (TSH) in your blood, a key hormone produced by the pituitary gland that regulates thyroid function. TSH controls the production of thyroid hormones (T3 and T4), which influence metabolism, energy, and mood. Abnormal TSH levels can signal hypothyroidism, hyperthyroidism, or pituitary dysfunction—even if symptoms are subtle or not yet apparent.  Read our complete guide to Thyroid Stimulating Hormone →