3,3'-Diiodothyronine

3,3'-Diiodothyronine, also known as 3,3'-T2, is a metabolite of thyroid hormone. 3,3'-Diiodothyronine, also known as 3,3'-T2, is a metabolite of thyroid hormone. It is formed from the breakdown of triiodothyronine. Levels can be affected in certain disease states.