With a transplant, they do not want us having the dye and usually have some other stuff to drink that starts with a G. I have it written down somewhere, but the stuff is nasty, salty tasting. I had to drink 6 cups (about 12 oz each), but was also used in oatmeal for a gastro test I had. So hopefully you will be asking for more options other than they dye they want to use. It is your body and not their's to toy with. Good Luck paul.karen