--that if you have a definitively diagnosed B12 deficiency, one of the best things you can do is continue to supplement with B12, to allow whatever repair can happen to happen--are you still doing that?

And it does not have to be through prescription injection--daily oral large-dose supplementation can be done on your own, and is generally at least as effective as periodic injection, often more so, as your body is constantly given B12. People who are deficient in B12 will generally need it for life, even if the cause of the deficiency is found.

Most of us here recommend getting methylcobalamin form, which is readily usable by the body (not cyanocobalamin, which has to jump through several metabolic hoops to become usable--just in case you have a polymorphism that interferes with your methylation chemistry). Doses range up to 5000mcg/day or more for people highly deficient, with 1000mcg/day being more of a maintenance dose. And methylcobalamin is now readily available through a number of on-line sources, and is just pennies a day.