Thanks for your prompt reply MrsD. I've asked my doctor if I can increase my dosage and he seemed to be against it...

As for length of time to heal, based on your experience, is it possible to get an estimate (weeks, months, years)? As I've mentioned, my symptoms really started to show up about a year ago.

From the link you've provided, I've noticed that iron levels can be lowered when taking b12. Is this common? Furthermore, have you heard of total iron binding capacity and transferrin saturation being affected as well when on b12? My levels were fine before, but after taking the supplements, they are now above/below normal range.