Scarlett...that is a link to a Midwife's Diary and doesn't indicate a knowledge of B12.....and i quote.
"Even more interesting - before dual qualified midwife and nurse Samantha Nash was diagnosed, she’d never heard of it either, despite working with vitamin deficiencies in her infant feeding co-ordinator role."
That is unacceptable in a qualified nurse, not to have heard of B12 defy and presumably pernicious Anaemia.
Again I quote:
"Vitamin B12 deficiency is a disease of the nerves – the myelin sheath, which is the fatty covering of the nerve, becomes frayed so messages don’t pass easily."
No it isn't, it is a disease of the blood, red cells in particular and the nerve problem may or may not follow the undiagnosed B12 deficiency.
I do not accept that link as an accurate or useful fact provider on Vit B12 defy.
as for arthritic diseases, they are quite different and often produce negative blood tests, but B12 defy are always apparent on blood tests.