My diet in the last year has been pretty healthy already, although I drank a lot of coffee and ate some fast food. The diet and teas are purported to help this. It says if you are sensitive to apples you may substitute grapes or other low-acid fruits. Tuna and water-packed fish are also ok. The book recommends carrot celery every day.
Book generalizes fruit as cleansers and veges as builders.
If absolutely necessary, up to 3 cups of decaf coffee ok, but not recommended. Provides vitamins and fiber. Honey is substitute. I also know that some cancer patients change their diets to combat certain cancers as well. The teas are purported to aid and stimulate rebuilding, cleasing and proper digestion in the intestinal tract.