Measure your Free T4 levels! This key thyroid function test measures the unbound, biologically active form of Thyroxine circulating in your blood. Free T4 directly indicates how much hormone is available to regulate your entire metabolism, energy, and body temperature. It is the most reliable marker for assessing your true thyroid status because it isn't affected by carrier protein changes (like those caused by pregnancy or estrogen). Essential for accurately diagnosing and monitoring hypothyroidism (low Free T4) and hyperthyroidism (high Free T4), and optimizing hormone replacement therapy. Check your Free T4 for a precise view of your endocrine health!
