I have been on levothyroxine for 10 years and been poorly for the last 5. I've been Round and round in circles with various doctors and consultants and ineffective treatments (never an endocrinologist funnily enough) and eventually lost my faith in the NHS helping me. I now self treat with T3 in addition to my T4 and pay for my own monitoring bloody tests. I want to tell my GP (he prescribes by levo and it's not fair to present the full picture I think) but want to do it by letter as I get all tongue tied and find it hard to articulate myself and can't squeeze it all in in ten minutes- has anyone ever written such a letter and could help with some content given that GP's are being told there is not enough scientific evidence to support the use of T3 and some have the belief that it causes heart problems and osteoporosis? Do you think I have to back any statements up with research? Thanks as always in advance all.