T4 Normal Range: What Your Test Results Mean

Understanding the T4 Normal Range: What Your Thyroid Test Results Mean

Your thyroid is a small, butterfly-shaped gland located at the base of your neck, but it packs a massive punch when it comes to regulating your body. It produces hormones that control everything from your heart rate to how quickly you burn calories. One of the primary hormones it creates is thyroxine, universally known as T4.