Maybe you could copy/paste what in that wiki page you're referring to.
As for articles on glutathione that don't have "warnings"...ah...you never posted anything in response to my post above. You know..the one that ends in "NOT THE END OF THREAD"
The only "warnings" I've read are about taking too much(the ones I've read that say there's no real evidence for even that)...the IV glut..and NAC. And again..there are plenty of supplements one shouldn't or probably shouldn't take "long-term"(which varies). Even if there is no evidence for it being a bad idea to take glutathione "long-term"..it's probably a good idea to rotate(either at the same time or switching to another after months of one) something like acetyl glutathione with a whey product or another glut-booster.