My husband had spinal fusion a few years ago for numbness and pain in his legs. This included severe tingling in his toes. About a year ago he started taking curcumin (with black pepper extract for bioavailability), 500mg twice a day for pain relief. He believes that it is the best thing he’s done since his surgery. It took a couple of months for it to become effective. This is different from neuropathy, but at least it’s responding to your original question. I hope you find some better answers.
Best of luck.