I don’t have much knowledge on thyroid hormones to comment on that. One thing I would say though is. If your reverse T3 problem is related to your ferritin levels, in my opinion, the best long term approach to raise yor ferritin is stop donating blood. If you add iron supplementation you might end up with high HCT again then you will have to donate or lower your testosterone dosage even more and not feel good. Like many say TRT is a marathon not a sprint. So a bit of patience here goes a long way. If your medication is really taking care of HCT the best long term approach for you and your health is stop donating blood in my opinion (at least that frequently and until your ferritin is back to target levels)So you think the high reverse t3 is likely due to something else? How do I figure that out?