The normal ranges of T3, T4 and TSH is actually depends on the type of assay and how the test is done in different labs. In most of the labs what they use is the nanograms per ml or micrograms per deciliter for T3 and T4 and for TSH are microintrernational units per ml. For TSH the range is 0.4 to 5.4, which is the normal range for TSH. But we have to remember that the normal range varies with age. So for a youngster who is 25 years of age, women, planning pregnancy, the normal is to keep the TS

Understanding if you have a high TSH is SO important because it will help you understand how well your thyroid is functioning. TSH is produced by your pituitary gland in your brain and it tells your thyroid gland to produce more hormone. A high TSH is associated with LOW thyroid hormone (which can be confusing but it's because of feedback loops in the brain). The higher your TSH gets the more hypothyroid you will become and the more symptoms you will experience. There is a difference between a N