In the book Burroughs mentions not using the reconstituted lemon juice, if that's what you mean? No living enzymes to sustain you during the cleanse. It doesn't take much to squeeze them if you can find the time. If you do end up doing a 3 day cleanse, like you mentioned in your other post, it may not be too bad to use the reconstituted stuff, but I would always go for the freshest, most healthy ingredients possible - you'll feel better!