There are many factors that can affect a thyroid blood test, such as age, weight, and health history. Your doctor will review these factors before ordering a blood test. A full thyroid blood test measures the levels of thyroid hormone in your blood. Thyroid hormone is important for your body's metabolism. A full thyroid blood test can help your doctor diagnose thyroid problems, such as an underactive thyroid or Graves' disease. A full thyroid blood test can also help your doctor monitor your thyroid health over time. Book your thyroid hormone profile blood tests to test for thyroid function. Visit Anna Pharmacy Group at Carshalton, Sutton, Hackbridge, Wallington & Croydon.