Hi, It is not that I am looking for a shortage, but I want to exclude it because of all my current health issues. I have a lot of mineral and vitamin shortages and I would be suprised if my b12 levels are normal. And because of more health issues, I can't determine a b12 deficiency based on the symptom list. I am deficient in cobalt; 0.1 Normal serum Vitamin b12 test by doc: 325 pmol/L Doc says: All good! Is there something I can check more to rule out a b12 deficiency? Thanks.