I noticed Andrea Moritz and such advocate grapefruit, or lemon AND oranges together. However I get Acne from grapefruit; my first flush I did it with lemon and no stones came out. It might be because it was my first flush that did some "digging". I did 3 with grapefruit and saw stones come out, however I got Acne with them. I'm thinking of trying lemon only again; just wondering what other people's opinions and experiences are with doing it with lemon.