Finally I guessed B6, he said maybe, I stopped it completely (that was a rough road), and
major changes started to happen in 8 days. It took about 3
years, I'd say, to get to the point where I didn't notice any remaining effect. But I'm still very sensitive to it. I can't yet take a whole Centrum each day (that's all of 2mg) without feeling a little wierd on my fingertips and toes after a week or two.
Anyway, it's a long story. Let me know if you want to know more.