Came across this as one of the causes of nueropathy. Quit talking all multi vitamin supplements to see if my symptoms would improve. Got tested a week after being off vitamin supplements and my level was 106.5. I couldn't find any information about at which point B6 becomes toxic and causes nueropathy. Not sure if it is my problem or not but it would make sense since I started getting nueropathy when I was training hard and drinking lots of sports drinks and started to feel crummy so I started loading up on the vitamins. My Doctor had given me a vitamin drink that was making me sick everytime I drank it and it.