I had my bloods taken back in October last year and was at 121 on my b12 levels. I had the loading injections and re tested bloods a week ago which have come back at 208. The doctor has said this is fine and no further action is required. I feel okay in myself other than being constantly tired even after a good long sleep. I also get confused or forgteful occasionally and have been having some chest problems. I have found a B12 oral spray and wondered if anyone else has tried it and if so did it work?