I am up to and maintaining 30 000 mcg's throughout the day of the methyl B12. My urine is not discolored in the manner referred to here. But I am also taking 3200 mcg's of methylfolate throughout the day as well, and I do take it at the same time as the methyl and ad B12's. So this would mean to me that the timing of these doses for me and the absence of the red tinge to urine, would be my body is absorbing the methyl b12?
The idea is that higher doses at once penetrate further into the body and that a dose of ~7.5mg injectable is able to penetrate the CSF, even if the total amount is the same, the lower more frequent dosages will not have the same depth of effect.
I never saw the red in my urine when I used the lozenges, no matter how many I took...