I've recently been advised to take thyroid treatment, as well as my monthly b12 injections as the dr believes my thyroid levels could be affecting the absorption of the b12 and the symptoms wouldn't reappear as quickly.
I'm concerned at starting this as I'm worried the b12 def may be causing stress on my thyroid, so have been reading about the benefits of iodine and adrenal testing (because I'm underweight, rather than the usual overweight of hypothyroidism and read adrenal issues can be the cause of this and it can be dangerous to take thyroid meds without correcting first)
I've found various tests and although have undertaken adrenal testing before, haven't done a iodine test.
Wondering if anyone has and whether the urine or pinprick are more beneficial please? Neither involve taking an iodine supplement first. Can see a good offer on over Bank hol weekend, but unsure whether a preference between the urine or blood for iodine.
Any help gratefully received thank you.