I had my B12 tested this week which is:
Serum vitamin B12 - 224 ng/L (180 - 900 ng/L )
The doctor has marked it as normal.
I have already bought jarrow methyl b12 5000 mcg. My question is how much should I take to bring the levels up - And what level should I be aiming for?
Many thanks in advance you wonderful knowledgable people