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T3 Conversion Rates

Meaning

T3 Conversion Rates refer to the quantitative efficiency and speed at which the relatively inactive prohormone, thyroxine (T4), is enzymatically converted into the biologically potent hormone, triiodothyronine (T3), primarily within peripheral tissues such as the liver, kidneys, and brain. This conversion is a critical, often overlooked, step in the thyroid hormone cascade, determining the amount of active hormone available at the cellular receptor level. Suboptimal rates can lead to symptoms of hypothyroidism despite normal TSH and T4 levels.