This is my first post, I don't know will I manage to explain properly what I would like to ask. I am taking T4/T3 therapy. I spent 3 months on only T3 cleaning my RT3. Now I am back on T4/T3 but I think I was feeling better when I was on just T3. I am confused about this subject. Does organism needs T4 at all or not? I have problems with converting it to T3, but does it have any purpose on its own, like just T4, when it is not converted? There are so many different opinions, so I am lost in them all. I know there are people doing well on just T3, but some are saying that they need some T4, can anyone please explain why there are so many opinions because I can't make up my mind what to take. Thanks.