Sorry, I missed the cassava flour question. Cassava is good in many areas, gluten free, nut free, but it is a starch. This is the problem with it. Depending on where you are in the program you could try a little bit after muscle testing for it and see if the body accepts it, but watch for symptoms. It would be something to use once in a while but not all of the time. Too much starch feeds the candida. Our kids need fiber too but some have a hard time with it in the early stages. If fibrous vegetables are working well, then you may be able to use it, but again, on occasion.