Thank you very much for the reply.

My D levels are 60 something - they have been thereabouts for a year or two after supplementing approx. 4k per day D3 and getting sunshine.

B12 was just measured at 673 pg/ml.

I will consider a test from the lab you mentioned.

Do you think the high B6 is a good clue to my PN?

Also, if I was to try the P5P, at what time frame should I look at my symptoms to evaluate whether that is helping or hurting? A few days? A few months?

Thanks again for the help.