TSH is a vital pituitary hormone. Thyroid Stimulating Hormone level in a normal adult is 0.4 4.0 mIU/L. The U-TSH test is a qualitative examination of the amount of Thyroid Stimulating Hormone or Thyrotropin in human serum. The TSH Ultrasensitive test is one of the most significant and consistent tests to appraise functioning of thyroid in an individual. Simply, a blood test is conducted for Primary Hyperthyroidism, Hypothyroidism, estimating TRH or to monitor patients going through thyroid replacement therapy. After evaluation of initial symptoms, your doctor may recommend the test. U-TSH test is generally performed in connection with other investigations. It is a highly sensitive test and effective test.