Review Prostasol/Quercetin Plus has done a great job in holding my PSA to insignificant numbers for many years, at times with as few as 2 capsules per day. I have also taken as many as 12 a day when cancer has become more aggressive and it continues to lower my PSA. Rarely there have been batches that have not worked, but it has been quite consistently potent over the last few years. I was diagnosed in 2/92 with a PSA of 14 and a gleason of 5.
