Hi Kimberly, I too have taken supplements for decades. Once I was diagnosed and treated for GBS this past July, I began researching nutritional supplements to promote myelin sheath repair. I came up with a similar list to yours.
I have been taking supplements throughout my recovery. I have been taking liquid vitamin d, b-12, multivitamin, omega 3, n-acetyl-l-carnitine and lipoic acid. I had quite severe numbness/pins and needles in my feet. I was diagnosed in April 2014, and though my feet aren't completely normal yet, they are not painful at all and I think it will be just a month or two more before they are back to normal. I started weening myself off of gabapentin when I returned home, and while I found the three days after a decrease very uncomfortable, my feet ended up feeling better after each decrease. I can't say for sure that the vitamins make a difference because I don't know what would have happened if I hadn't taken them, but I'm four months since my hospitalization and feeling very good. I think the most important ones for nerves are vitamin d, b-12 and omega 3. I take the vitamin d and omega 3 in liquid form as the dosage I take is much higher than a single pill.