Hey Osband,
Have you tried lowering/banning sugar ingestion? That seems to be working for me, but well, I stopped eating sugar (glucose, fructose) and started taking supplements at the same time so there's no way to know.

I'm favoring the theory that PN in non-diabetics like us might still be due to damage by spikes of hyperglycemia. I think Dr. Smith said it better somewhere.

Oh, I stopped drinking coffee too, because it looks like caffeine makes your blood sugar after a meal not only higher but also keeps it there for a longer period of time. That story is at this post.

And well, I also quitted stressing so much about it. Argh, maybe that's the useful part...

Maybe the effect of "no sugar-no coffee-more vitamins" is to allow some people to finally take it easy and THAT'S what improves the PN? There could be something there, you know?

Thanks for the update, take care.
sUsY