First of all, I'm sorry your friend is so sick. Even people who READ the book have been known to disregard the instuctions about consulting a doctor if you are on meds especially, and jump right to the "good stuff". The non-readers and disregarders then think "the diet made me sick, I can't do it!".

That's really sad, because they've kind of shot themselves in the foot by being in such a hurry.