Why is Cutler so against supplemental glutathione?

I've been reading posts here for months and have also read Andy Cutler's book on Amalgam illness and I've learned a lot.

One thing I don't understand, however, is why he's so against supplemental glutathione? The only thing I really gathered from his book was that oral supplemtation of GSH wasn't effective, but since there are now liposomal forms and suppositories (which would, theoretically, be more effective in getting absorbed properly), I don't understand why he's so against it.

In one post on the Yahoo group, he said that about half the people who get GSH IV's actually get much worse, which doesn't make sense to me since GSH is the body's chief way of eliminating toxins.

Could someone explain why extra GSH would be bad? I'm getting my fillings out over the next 2 weeks and want to have all my supplies ready for chelation... Tweet