Measure your T3 (Triiodothyronine) levels! T3 is the active thyroid hormone that directly controls your metabolism, energy production, and heart rate. Essential for assessing true thyroid function, especially when diagnosing hyperthyroidism (high T3) or monitoring T4-to-T3 conversion issues. Understand the difference between Total T3 and Free T3 for a precise view of your metabolic health and vitality. Check your active T3 status!
