My PSA in 2005 was 1.2; in 2007 1.8; in 2008 1.7. My family Dr., having consulted w/ urologists between last 2 test, recommended urologist. Urologist biopsied 3/2009. Adenocarcinoma in 6 of 12 cores, Gleason of 3+4 in 5, 3+3 in 1. Surface area varied between 5% and 70%; average 40%. Perineural invasion in 2. I have mostly eliminated meat & dairy and consume large amount of various recommended vegies, fruits, etc. Also taking Metagenics supplements (for last month). Had another PSA mid August and it has dropped to 1.4. My question: is it unlikely/possible/likely that the drop in my PSA indicates lessening of the cancer?