I am 72, newly diagnosed and start my course of B12 injections on Wednesday. However, In the UK (Scotland) it is standard practice to use hydroxocobalamin and not methylcobalomin. Since diagnosis I have read extensively about B12 deficiency and the different B12 replacements and it seemed to me that methylcobalamin would be the best choice since it would also help with my arthritis and diabetes. I would be grateful for any comments or advice and getting a GP to change his mind about which replacement to use. Or indeed any advice at all.