Not a smoker and have never smoked. Central nervous system damage due to autoimmune-related severe B12 malabsorption.
Will go to the mat for anyone's right to smoke, as long as they don't smoke where others have to breathe it.
I only mentioned smoking as a nutrient issue because smokers have been found to have less usable B12 (who knows, maybe other studies found the opposite). So, if I smoked I would take methylcobalamin and a B complex.

Of course, I think people with nerve problems should take methylcobalamin and B complex.
rose