For me, I realized I have B12 and Vitamin D deficiency
so needed to take those vitamins and avoid B6. I live in
the NW with no sunlight and have been breastfeeding a baby so all my nutrients went to him.
I have heard it takes about three years for full recovery. The thing I don't really understand is why this happens. The first time it happened to me (two years ago) I was taking a fairly high dose of B complex.