please check those two results... B12 actual number, and
the bicarb test (you may not have had it)

Vancomycin is absorbed orally....not much but enough over time and also in some circumstances such as GI inflammation may increase blood levels.
http://books.google.com/books?id=F0n...sult#PPA329,M1

Vancomycin is a known PN causer.

Xifaxan is less absorbed...3% or less.

When a young person gets PN one really has to consider toxins, and drugs first. Also hereditary PNs like CMT--Charcot Marie Tooth can be tested for.

The elevated fasting insulin suggests the beginning of insulin resistance and may in females point to PCOS as well, or elevated adrenal functioning (but you said you were tested for this already--Cushings?)

I was 30 when my hypothyroid problems started in my feet.

I think diabetic PN is not likely for you yet. It takes TIME to develop and you are young still.

Most sarcoid patients have it in the lungs. But it can occur anywhere. There is a forum with information on this and a novel treatment. Google The Marshall Protocol ( we cannot link to other health forums here) and check sarcoid out. Even if you do not get that treatment, there is info there that may help you understand this better.