Another good source of research and understanding information is the Linus Pauling Institute. They have a lot of good information on micronutrients.

Vitamin B6: https://lpi.oregonstate.edu/mic/vitamins/vitamin-B6#toxicity

Thank you. Yes, I've visited that website and was going to mention it. Have you applied the protocol?
They say that B6 can still be in muscles and nerves and not show up on a blood test. So, to closely monitor how much B6 one gets in food only and to keep it around the RDA daily amount. And to stay away from vasodilators such as anything with magnesium in it. They also say to drink 1 liter of water with 1/8 t salt in each liter and to drink this 3x a day, one liter of pedialyte and 1/2 liter of coconut water. I tried following this protocol for awhile. I found that the salt added to water made my legs swell and my neuropathy symptoms stronger. Sugar also aggravates neuropathy and drinking pedialyte that has sugar in it didn't work for me.
Perhaps I didn't try to stick to the protocol long enough. It was also alarming to read the posts by people in their facebook group that described how their symptoms sometimes got really worse for awhile and was told that was a normal part of the process.
Perhaps you can explain this better if you are familiar with the protocol.