I just started IGRT and had pre-treatment PSA done 3 weeks ago that showed that my PSA dropped 0.8 in just 3 month from 2.7 to 1.9 without any treatments. My PSA was very consistent for the last couple years around 2.5 and slight grows to 2.7 in June 2018. I am really puzzled why PSA went down that far without treatment. I understand possibility of lab error +or- 0.1/0.2 but not 0.8. The only thing I have changed is a very strict diet (no sugar(glucose), no dairy. no glutton and no red meat) started beginning of April 2018. Can it be indication that cancer is shrinking due to diet? Any other explanations. I understand that I am qualified for AS but I decided to go through treatment because of insurance uncertainties, as I am self-employed and do not know what happens to Obamacare, premiums and participating insurance companies. My Dad was self-employed and had prostate cancer around age 60 but did not have insurance until 65 and ended up with multiple radiation treatments and HT.
Having never seen a PSA go down in the previous 10-14 years, indeed having only seen them go up, I saw mine drop 25%- from 11 some odd to about
8- in the ~ 2 months between diagnosis and RP. Even previous antibiotics did not slow down the rise, plus my biopsy was not unlikely to cause even further rise. I made various DIY interventions during those 2 months(between biopsy and RP) based on things rumored to be helpful while avoiding items rumored to be bad. Did any of this actually have any influence on my PC cells? Impossible to say. Many would say no, and they might be right.
But if a PSA goes down in response to any conventional treatment, it is always considered a good thing. And the one thing we can say with certainty is that mine dropped 25% when it had never dropped before, indeed had never failed to rise before. Any significance thereof, or lack thereof, I will leave it for others to decide.
So, you drastically cut the sugar and your PSA went down without treatment? If you cut the sugar/carbs way back, then most likely you also cut your blood insulin way back, even if your blood sugar dropped very little or not at all. Type 2 diabetics and the high blood insulin and insulin resistance that they by definition possess have worse outcomes with all cancers. As for PC specifically, in one study the patients who had the highest blood insulin and waist to hip ratios(biggest guts, a sign of high insulin) had as much as 8 times worse clinical outcome.
So, is it at least possible that you have turned down your PC growth rate by cutting sugar and thus lowering blood insulin which is produced in response to ingested carbs? In my opinion, no question about
it. Can I prove it with RCTs? Nope. But if what you are doing has not hurt and seems to maybe help, will you be sticking with it?