Have´nt had the time to read all the messages on this forum, about IP6 but from the little I´ve gathered, remembered reading about "similar" properties of a herb called Artemesia. Here are 2 links.... the first one describes the targetting of Iron in cancerous cells and the second more about the use of artemesia for curing malaria (and cancer??) the natural way i.e. by using a tea.
1) http://www.washington.edu/newsroom/news/2001archive/11-01archive/k112601.html