The antibodies did not show up in my blood until one year after I had RAI. I didn’t know that could be an independent event. I was releived when the antibodies showed up because I was afraid that I never had Graves and that I radiated my thryoid for nothing. I thought perhaps that my symptoms were something else and maybe would have gone away. So, anyway, I was shocked when the antibodies showed up later than diagnosis. I had symptoms, hot flashes, hyper, hair falling out, etc. My uptake was 83%. My TSH was non-existent but I had no antibodies. I do now. Hope this helps.