--to find out why the B6 levels were so high (especially if you are not supplementing).

B6 "intoxication" can cause neuropathy symptoms in some cases. Mrs. D has accumulated a lot of abstracts on our supplement "sticky" that seems to point to this often having to do with a genetic mutation that makes some people unable to methylate pyridoxine (the "raw" from of B6), which causes an accumulation of unused B6 in the body over time and may lead to symptoms, though this generally happens only to those who take a lot of extra B6. Curiously, this does not seem to happen to those who take the already methylated P-5-P form of the vitamin.

See:

http://neuromuscular.wustl.edu/nothe...yridoxineintox

http://neurotalk.psychcentral.com/thread121683.html