repairing nerves...

In this book...there is a chapter on nerve repair:

http://www.lef.org/magazine/mag99/sept99_review.html

This author suggests (and I agree) that essential fatty acids in addition to
B12, B6, and folate are needed. Since many people may have genetic errors in metabolism of the B's...using the activated forms may be necessary (he does not go into that area however). Nerve sheaths are composed of fatty acids, and our diets are typically lacking the good ones. Avoid trans fats at all costs. Fortunately food products and restaurants are discontinuing using them now. Even in the remote boonies this summer, one of our fave eats spot had signs on each table explaining the new non-trans fat they were using.
It was a combo of a little corn oil (to raise smoke point for frying) + canola. So it is getting easier now to eat out safely.

And it follows if you take essential fatty acids in food or supplements, you need adequate magnesium to convert them. (the book does not go into that either).

Since one wouldn't be in tough straights unless "something" is wrong, I tend to
recommend the activated forms. These are found in Metanx Rx product.
You can also get them separately...but the methylfolate is no longer available, only the Folinic acid form. Merck greedily stopped providing it to distributors to beef up the RX sales. Source Naturals is providing folinic acid now.