Welcome to Shoot Up Sue! I’m afraid I know nothing about Byetta either – but I bet someone here does…
I’m not sure how xrays would effect insulin either – if xrays effected proteins then you would get cooked every time you had an xray. Which I guess wouldn’t be ideal. Might your insulin problems be caused by an other factor – such as not keeping it in a fridge while you’re on your holibags?
I know as soon as I’ve said this that other readers will correct me saying “it’s well-established that xrays cause problems to insulin, I can’t believe you don’t know that…” But, hey, I’m used to that 