I am seeing the neurologist next week and hoping to persuade him to let me try methylcobalamin rather than cyanocobalamin for a while. I am in the US, and it seems this may be a bit complicated, as I cannot order methylcobalamin injections from my usual pharmacy and will have to order them from a special compounding pharmacy, which may require some extra effort on the part of my doctors and she convincing of my insurance to cover the methyl. So, I am trying to be well-prepared for why the switch is important and why their extra efforts and insurance payment are justified. I wondered if anyone knows of a convincing reference for why methyl is preferable to cyano for some patients, particularly those with neurological symptoms that are not improving on cyano. Thank you in advance!