The form of vitamin B6 in supplements is pyroxidine hydrochloride, which at high levels (mostly >100mg/day) can cause peripheral neuropathy. So can zinc. A lot

The form of vitamin B6 in supplements is pyroxidine hydrochloride, which at high levels (mostly >100mg/day) can cause peripheral neuropathy. So can zinc. A lot of times it's overlooked that the form of the vitamin is different from what the body usually receives/produces.