I actually don't think the cause of my neuropathy is related to glucose issues. I'm sure the glucose spikes weren't helping at all, and if any good has come from this "adventure," it's that I may have staved off an eventual diabetes diagnosis. I think my cause is hormonal, spinal or gut-related. I had issues in all three areas right before onset.

I take this probiotic:

Amazon.com: Jarrow Formulas Jarro-Dophilus EPS, Supports Intestinal Function and Health, 12 Veggie Capsules: Health & Personal Care

I had contemplated taking the uBiome test or one like it, but they seem to still be a little questionable result-wise. I haven't looked into them lately, though.