Originally Posted by Tystys

i am taking 1000mcg of methycobalimin daily and then 2000mcg on work out days, but i get a really drowsy and tired feeling from taking them, and i feel quite foggy headed with poor concentration.
Could this mean that my b12 levels are low?
i got blood tests for my vit d, iron and floic, b12 all came back normal, but reading posts on this forum and doctors normal is way too low.