There are plenty of resources to help you learn more about vitamin B12 deficiency and to support you in your quest for better healthcare.
Books are always invaluable educational resources. The ones below are particularly excellent.
Could it be B12?: An Epidemic of Misdiagnoses – by Sally M. Pacholok
Living with Pernicious Anaemia and Vitamin B12 Deficiency – by Martyn Hooper
The Homocysteine Solution – by Patrick Holford
The Heart Revolution – by Dr. Kilmer McNully
Thorne Research – oral vitamin supplements. In our opinion these are the most bioavailable, with the most rigorous scientific research backing up their formulations. They are available in the UK.