@tmlpsm1942 B12 is a funny thing. You can have adequate b12 in your blood but for various reasons it’s not at the cellular level. My husband had pn from feet to chest and was finally diagnosed with subacute degeneration of the spine/transverse myelitis. He was given b12 injections daily to try and slow down progressive paralysis which lead to his death. Not to be a downer but if you have pn not caused by diabetes stay on top of it. It is taken too lightly by many doctors. God bless