Advice on test results please! TSH 6.72 FT4 13.9 Peroxidase antibody level 34.61 (which is the one I don't really understand) My GP has prescribed 50mg of Levothyroxine, which I have been taking for two weeks. I am already starting to feel better but after joining this site I realised that I should look at my test results which I got from GP receptionist today. No idea what to make of them. All comments/adivce very, very welcome.