Low B12? Why it matters and what to do about it

I have seen so many vitamin B 12 levels from clients lately that are just so low that is mind boggling. Vitamin B12 (cobalamin) is essential for several key functions in the human body, including: Normal reference range for B12 is 110-600pmol/l here in New Zealand (and similar in other Western countries). Interestingly, and for reference, in Japan it