--though I'm sorry for the small-fiber neuropathy that led you to find us.
We have a LOT of information over at our peripheral neuropathy section that might be useful--not only on supplements, but on other ways to reduce symptoms, possible causes, tests that might be useful to have done, and the like, so come on over and visit (it's a very knowledgeable group):
https://www.neurotalk.org/forum20/