I was so fascinated by this book and The Cure for All Diseases that I completed most of the steps even though I don't have cancer and it doesn't run in my family. I have no idea if the parasite herbs had any effect but the results of the liver cleanse are undeniable: I got rid of over two thousand liver stones (commonly called "gallstones"), most the size of peas and a couple the size of grapes, without surgery. Doctors would tell you this is impossible, but this relatively easy procedure has dramatic results, I highly recommend doing it.
I did the dental cleanup, and I'm really glad I got all that mercury out of my mouth, but it didn't seem to help my depression. The only thing that has helped me is a deep colon cleanse (not in the book), hard work and exercise.
As for the electronic "zapper", I built one, which was kind of fun, and used it, but I really can't say that it had any effect on me, and it failed to shorten the duration of a cold. Her explanation of the synchrometer is science way outside of anything that modern medicine recognizes, but before it is dismissed out of hand, as some of the reviewers here have done, it should be thoroughly tested clinically. Unfortunately that will probably never happen.
By drawing attention to environmental pollution and the ways to avoid it, Dr. Clark points us in the right direction to better overall health. This is an area most doctors totally ignore, when it is easier and more profitable to push pills. So we are left to experiment ourselves, which is so unfortunate when so many lives hang in the balance.