A white paper was published in May wherein over 100 people who had done the New Life Detoxification Program (one of the components of the Narconon program) were examined and surveyed and the results are quite telling.  The experts have said it, not just Jason and Joanie.  If you have questions, it’s worth a read.  

http://journals.sagepub.com/doi/10.1177/0300060518779314