Hi Cliffman:

I'm just curious - With your history of heart problems, are you taking statins? (They are pretty well known to cause PN, even if a lot of doctors continue to deny it.)

I would also follow mrsD's advice about oral methylcobalamin to bring your b12 up. And consider some methylfolate since your folate level is low.

And, with the low folate and marginal B12, mrsD's advice about having the genetic testing done to determine of you have any MTHFR mutations also makes sense. Those mutations impact your ability to convert and use the folic acid that all of our foods are supplemented with as well as the cyanocobalamin that is in most of the generic vitamins we take. I had the testing done, and found I had some of those mutations. I am now taking some specific supplements to treat the combination of mutations I have, and I seem to be doing better. (Not a miracle cure, but I believe it is helping to some extent.)