The Claim
Reverse-T3 constitutes approximately 62% of total triiodothyronine in hypothyroid patients and 57% in healthy controls.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In both people with hypothyroidism and healthy individuals, reverse-T3 makes up about 62% and 57% respectively of the total amount of triiodothyronine in the blood.
See the scientific wording
Reverse-T3 accounts for approximately 62% of total triiodothyronine in hypothyroid patients and 57% in healthy controls, indicating that reverse-T3 is a quantitatively dominant metabolite of thyroxine in both groups.
The main thyroid hormone, thyroxine, is broken down in tissues like the liver and muscles by enzymes that remove iodine atoms. When iodine is removed from the inner ring of thyroxine, it becomes reverse-T3; when removed from the outer ring, it becomes T3. In both healthy people and those with underactive thyroids, the enzyme activity favors removal from the inner ring, making reverse-T3 the most common form produced. This process happens outside the thyroid gland and accounts for the majority of all triiodothyronine molecules in the blood.
What the research says
1 studyIn both healthy people and those taking thyroid medicine, most of the active thyroid hormone byproduct in the blood is reverse-T3 — more than half — meaning it’s the most common form made from the main thyroid hormone.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.