T4 and TSH tests in Thyroid disease.

TSH (thyroid-stimulating hormone) and Free T4 tests are simple blood tests that measure the appropriateness of the thyroid gland’s hormone production. It is very important for patients with thyroid imbalance to know their TSH and Free T4 numbers.

• The optimal TSH range is 0.3 to 6.0 mIU/L.

• You should talk to your doctors about their Free T4 numbers since laboratory ranges can vary.