Free PSA percentage, along with absolute PSA, PSA velocity, and PSA density, provides valuable information for assessing prostate cancer risk.

“A low percent free PSA is associated with a higher likelihood that that PSA is produced from a gland with prostate cancer in it.”

“if you have from one blood measurement that costs less than a pack of gum you know your PSA you know your free PSA you know your PSA density y that's really powerful”

“percent free PSA gives you some uh of strong correlation between SI the size”

“if the percent free PSA is over 18 to 20 then you can be rest pretty well assured that that's likely not coming from some aggressive bulky tumor”

“Well, you would look at not just the PSA every year, which is what I would recommend, but you would also look at something called the PSA velocity, which measures, as its name suggests, the rate of change of PSA. And the higher the PSA velocity, which I think makes sense, the faster the rate of change or increase of PSA, the more likely that you might be dealing with a cancer, even absent a very high absolute PSA.”

“The final thing that you can get from this remarkable $5 test, that's right, $5 a year is what it's going to cost you to get a PSA, is your free PSA. And the percentage of the free PSA also tells you your likelihood as to whether or not um this is a um um a potentially uh uh dangerous uh PSA that's arising from a dangerous set of prostate cells or or not. So you have these three things that you're getting for free, right? You have from the PSA, you're getting the absolute number, you're getting the PSA velocity, the PSA density, and the free PSA.”