No. Our nerves are wrapped in an insulating fat called MYELIN. The older we get, the less myelin we make. Myelin is made from cobalamin in our diet. That's B12.
Elders eat less B12 rich food, meat and fish. Our stomachs hold less acid which removes B12 from food molecules. Then there's alcohol. It numbs the 20 ft long intestine reducing absorption. I fixed my trygeminal neuralgia by implementing above. Mussels have 10 times as much B12 as red meat. Most people don't eat them. Therefore one needs a daily supplement. Go for it and feel your nerve pain slowly go away. James.