It is done, 500mg rectal glutanthione.
Seriously, who ever rectally administers anything? I only did it because I informed myself after buying the supplements. And it turns out that glutanthione cannot be absorbed orally, so the only reasonable option left was rectally. Otherwise it would have been a waste of money. Then I read a study about rectal administration of the stuff in mice. And like I said, the levels only increase in the near vicinity.
Glutanthione does all sorts of magic stuff. Read it here:
http://en.wikipedia.org/wiki/Glutathione#FunctionWho knows? I might have discovered something entirely unthought of.