I did some research on the CAAT protocol as developed by the A.P. John Institute, when I was first diagnosed. I adopted many of the dietary suggestions and recommended supplements without paying the $1,000/month for the amino acids and personal consultations.
The CAAT protocol is actually very similar to the diet and supplement program recommended by Patrick Quillan in his book, "Beating Cancer with Nutrition". This book is a classic in cancer treatment, dealing with diet, supplements, vitamins, minerals, alternative treatments, etc. I highly recommend it as a starting point. It is also loaded with references to articles in standard scientific/medical journals for those who want to verify facts and claims made for various supplements and treatments.
I feel I have benefitted from the information I got from the A.P. John web site and from the Quillan book. I don't think it is necessary to fork over the $1,000/month, but that is a personal judgement call. Some people really appreciate having a personal coach to guide them, and believe in the extra benefit they get from the amino acid formula obtained from A.P John.
Good luck to those trying a dietary regimen to fight their cancer!
Violarob in Texas