From what I have read in the past a diet to slow progression of prostate cancer was not just about increasing vegetables but also not eating those foods found to further progression.  In my opinion this study maybe one sided and not valid.  Comparable to someone trying to lose weight and drinking diet soda but eating too much of everything else.  I am very concerned with the validity of the study especially knowing that Dr. Parson's headed it. My experience with him as a patient was not positive.  I have been on active surveillance for 13 years. I have been using diet and exercise to help slow the progression.  I realize that I cannot prove that this has in fact slowed the cancer and maybe I am just lucky.  I have read too many studies about good and bad food for prostate cancer so I will continue my diet both eating those foods thought to slow progression as well as avoid foods found to cause progression.