impact of coffee or alcohol on PSA

I read a couple of articles on websites today suggesting that coffee or alcohol consumption can affect psa results.  For example, one site, which was linked on the Yannow site, stated:  "Alcohol and Coffee: Both can irritate the prostate and should be avoided for 48 hours prior to blood being drawn."    I had never heard that before.  Have any of you received that advice, or otherwise looked into this?

Even if this is true, I am wondering whether I should follow this advice.  My reasoning:  PSA trends may be more important than absolute values, and I have not abstained from coffee or alcohol in advance of prior PSA tests.  So maybe better not to do so in the future either, so that my results are comparable.  (Same idea as using the same lab/assay).

Thoughts?

 

I don't know what affect that alcohol and caffine have on psa, but I doubt that it is much. As Medved said the real value of psa is how it reacts over time; this can tell us a lot about our pc, much more than just one reading.
PSA can fluctuate about 25% from day to day; If you don't believe this go on Yannow and see the test that Terry Hurber ran, taking psa tests daily for 30 days. The daily fluctuations are remarkable and anyone who would even think of making a decision based on only one or two psa tests should look at Terry's little test.
JohnT

I think the effect would be minimal.

I read somewhere that having sex or the "release of semen by other means" within 24 hours of a PSA test can slightly increase PSA levels.

Post Edited (JLW1974) : 7/27/2010 12:45:27 PM (GMT-6)

I think both irritate the prostate. I went in for my PSA test after a three day "hunt camp", more of a drinking camp, my liver count was way up in all categories and my PSA jumped .60. I went back for a new test and abstained from everything  for 7 days and my PSA dropped .66 and liver went close to normal. I will be posting new results under separate cover today. I abstained  for 4 days prior to all the same tests. Waiting for my doctor to call right now. Praying PSA has not gone up.