A lot of internet myths and misinformation surrounds Reverse T3 (RT3). Well-meaning people have attributed to the hormone a “T3-blocking” function. However, the enzyme deiodinase type 3 (D3) (NOT Vitamin D3, which is very different) is the main blocker of T3 hormone. Deiodinase type 3 (D3), regulated by the DIO3 gene, is the enzyme that … Continue reading Deiodinase Type 3, not RT3, plays the T3-blocking role
