Yes Rlipoic is supposedly better because of the way it absorbs better using less product. Wish I could take it, it cause acid reflux for me but many people here have great success with it. Use the search box and put in Rlipoic acid and read all the stuff on it.

I figure if my PN is due to a supplement deficiency I will find it since I am aiming to hit all the main supplements and already do with most.

I have decided NOT to bother with an further testing at this point.