T3 Resin Uptake Test

The T3 Resin Uptake Test measures the amount of thyroid-binding proteins in your blood that can attach to a hormone called T3, which influences your metabolism. It helps doctors evaluate your thyroid function by estimating how much T3 is available for your body's tissues. The test involves adding a special resin (a type of material) to your blood sample to see how much T3 binds to it, providing insight into your thyroid health. It is often used alongside other thyroid tests to diagnose conditions like hypothyroidism or hyperthyroidism.