Sorry for sounding so grouchy before. It just seems to me like people are always looking for new ways to ignore their cats. Or rather, manufacturers are looking for new ways to make a profit off of things that help people ignore their cats.
IF this litter was actually reliable, it should, in my opinion be used, by prescription only, available through the vet in other words, for cats already known to have problems. And expensive enough so it would be used ONLY for testing to see if the cat was still okay.
That is just my cynical opinion of course.