I've been on the protocol since Sept 2016 have some feeling returned to my feet but I still have numbness and some tingling. I do think it's stopped the progression but it's only my opinion and since I didn't have a nerve skin punch biopsy when I was diagnosed there is no evidence that the progression is stopped. For others on the protocol it's actually allowed them to get pain relief without the seizure medications normally used to treat neuropathy pain.