They say one cannot consume too much B6 with the food. And I don't remember myself ever supplementing with B6. And yes, I know that an excess of B6 is toxic for the nerves. I read one theory that too much B6 in serum means not enough of it in the tissues. So they advice to take the big doses of B6 to get it into the tissues. And what about more toxicity for the nerves?
Also information on B6 is somewhat contradicting: it causes neuropathy when you have too much of it but it also causes neuropathy when you are deficient. Sigh...