I have been having b12 injections for the last year after loading doses and then three monthly .
My question is that as I feel so tired and under the weather since Monday when I had it , is it possible that it is a shock to the system after twelve weeks ?
I also have an under active thyroid .
Thank you in advance
Pp
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Pinkpeony
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There are interactions between B12 and thyroid problems. Sometimes B12 supplementation means that levels of thyroid medication need to be adjusted so it could be that.
Its difficult to say for sure but if you haven't experienced this with previous B12 shots I'd be inclined to think it more likely that thyroid is the problem.
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