Hi, looking for some advice on my Serum b12 levels - have been experiencing all the symptoms of vitamin b12 deficiency for several months, and have had lots of blood tests which have ruled out everything else. Just had b12 levels tested and the doctor says my results are normal, but I was wondering if I could get some advice on it. Also i had the serum test for b12, but have heard there is a more accurate one - is it the active b12 test or something?
Anyway, any help or advice would be appreciated
Serum b12 levels:
413 ng/L (190-800)