There is good stuff around, although it costs some $$. Spent last day looking abit on glutathione products, the liposomal glutathione and glutathione pleolyposome are some ways of getting the glutathione to absorb much better into cells. This pleolyposome has also been applied to other stuff like vit C, to get it to absorb better right into cells. These products are so new that there hasn't been much testing yet. But if these glutathione supplements work like it is claimed, then they are the closest thing presently available to an efficient detox and cure for any disease, including cancer. I'm not now talking about the side-effects, they may and should be pretty horrible, if it works.
But one thing appears to be pretty clear; usual glutathione absorbs poorly, and perhaps not at all for some individuals.