I found this old thread, so don't know how current this last one is. I also have this weird B6 toxicity problem. I was low at first & drs added it & then developed horrible 3 inch needles poking my entire body day & night. they tested it at 4 x the normal. toxic. Been off all b-6 2 yrs now & tried it in something a dr gave me & started it up all over again. It took 1 1/2 yrs to get the neuropathy down to just part of the evening & night. But when I eat too much food with B6 I go crazy agin. Every thing has b-6. Found only 4 foods that don't. I also when off gluten 1 year before this & wonder how that effected it. The only thing that has helped me is high doses of Alpha Lipoic Acid, my dr says heals nerves.
B6 needs to be balanced with mg. Perhaps you are magnesium deficient and need to increase Mg to normalize B6