Hi, I'm currently having b12 injections and noticed on the last blood test my TSH has gone from 0.42 to 3.14 and f4 is 13. I know these are still in range, but I'd like to check the antibodies, just for peace of mind as a couple of other family members have thyroid problems, and would like to rule it out. My ferritin has also been low, and although rose from 12 to 140 with supplements last year, has now dropped down to very bottom of range since I'd stopped supplementing and vit d has been low. ( have started back on iron and trying folate too as that was 6 (3-15) So I thought I'd try a pinprick test to and also check ferritin, vit d, Crp, etc, as well as thyroid.I know it's best to do the test as near to posting as possible, but have also read that thyroid testing is best done first thing. Is this just because of TSH levels or does it affect other parts such as f4,f3 and the antibodies please? If it's just the tsh, I'd rather forego that and do it nearer to posting?
Also, can anyone tell me whether it is a good idea to include the reverse 3 as well with my results, or not necessary, due to the extra costs?
Any help very much appreciated , once again...