Great replies everyone...thanks very much.
I've read somewhere also about the risk of using too much NAC. Dr Clark Bishop recommends taking NAC with GSH , and the brand of GSH we use has NAC in it, but only 50mg per capsule (Cur-caps, Theranatural). My son would have about 200-250 mg NAC a day that way.
<a target=_blank class=ftalternatingbarlinklarge href="http://members.tripod.com/uvicf/gsh/gshaugment.htm">http://members.tripod.com/uvicf/gsh/gshaugment.htm</a> (Dr Bishop's protocol).