Is anyone else having this problem? I'm up to date with Vit B12 injections at my surgery (Ihave them once a month) but have started to have the symptoms again and am off work at the moment, excessive tiredness, brain fog, dizziness, numbness in my left toes. Since changing from injections once every 2 months to once a month last year, my general health has been a lot better but now I feel like I'm back at square one. Can anyone recommend a specialist to go and see preferably north of London please? Thanks.