KnowraTriiodothyronineLinked fromLinked fromThe 8 pages that link to Triiodothyronine, each with the reason it gives.All 8Broader topic 3Related 4Compared with 1Thyroid hormonesBroader topic: T3 supplies much of the receptor activity attributed to thyroid hormones.HypothyroidismBroader topic: Low T3 can contribute to impaired hormone action in tissues.Thyroid-stimulating hormoneRelated: TSH supports its production, both directly in the thyroid and through T4 supply.Thyroid function testsRelated: T3 measurement can uncover or clarify hyperthyroidism when TSH is suppressed.LevothyroxineRelated: Conversion of levothyroxine-derived T4 to T3 supplies much of the active hormone.Central hypothyroidismRelated: Its concentration may remain less reduced than thyroxine in some cases.ThyroxineCompared with: T3 is the more active product formed when T4 loses an iodine atom.ThyroidBroader topic: The gland produces T3 directly and supplies T4 that tissues convert into T3.