Originally Posted by en bloc

Do you take a PPI for stomach issues, like reflux? They are known to cause problems with copper absorption.

On the other hand, if your autonomic issues include GI problems, you may have gastroparesis, which typically includes absorption problems as well.

Your are low in iron stores as well, so you seem to have an absorption problem.

Copper deficiency can certainly cause PN...but you need to know why your copper is low.