So in finishing up my deep dive into supplements, these were the three I had the most trouble making any definitive personal conclusions about so I wanted to do a review before putting them to bed to get any last input. My general feeling is without well-designed long-term studies (not retrospective observational), not even the scientists can give us reliably conclusive evidence. It's mainly about good overall diet and exercise. Most information seems to be referencing in-vitro and in-vivo mice studies. I've seen posts that claim Dr. Sartor says no on Omega-3, Snuffy Myers says yes, for example. Go figure.
With that said, it basically boils down to one should probably take the stance, "when in doubt, leave it out" -- that admittedly could probably eliminate about 90% of what people here are taking. So in the least, I'd follow the minimum rule, if there's any evidence of it potentially being negative, leave it out.
Omega-3 Supplements - My conclusion: "Neutral - but probably wise to avoid mega doses of Omega 3 Fish Oil > 4g a day"
For general health, it seems widely accepted that a lower ratio of Omega-6 to Omega-3 is better than a high ratio. The average American diet with our pizza, cheeseburgers, steaks, and chicken sandwiches appears to put a lot of people up near the 20:1 ratio. A general health go-to ratio I've seen referenced the most is to shoot for 4:1. I eat fish 2-3 times a week and am otherwise mainly vegan, and I can tell you from my diet log app, that ratio is virtually impossible without ingesting a bunch of ALA Omega-3 which is supposedly potentially a negative for PCa. (Note that I have hyperlipidemia and high blood pressure so I take low-dose Simvastatin and Losartan, combined with exercise and diet keeps my numbers in a good range.)
Regarding the data, I've read quite a few large studies that basically have confirmed that taking large quantities of fish oil supplements don't have as significant of cardiovascular benefit as they may be hyped up to provide. Considering I eat very little animal protein other than fish, I'm definitely not a good candidate to be needing large doses of Omega-3 supps in general I think.
The controversy appears to have been mainly fueled by a study done at Fred Hutchinson Cancer Center (in my backyard) in 2011
fredhutch.org/en/news/relea...
Mayo clinic later responded:
mayoclinicproceedings.org/a...
This article I think summed it up well:
ncbi.nlm.nih.gov/pmc/articl...
"Taken together, there are inadequate data to determine if fish-derived omega-3 fatty acids are associated with PrCa incidence and progression and how to advise PrCa patients who are considering fish oil supplementation. Preliminary research suggests that an association between higher omega-3 intake and decrease PrCa mortality may be present but more research is needed."
2015, 21 studies: pubmed.ncbi.nlm.nih.gov/258...
"In general, most summary associations for the dietary intake studies were in the inverse direction, whereas the majority of summary associations for the biomarker studies were in the positive direction, but all were weak in magnitude. The results from this meta-analysis do not support an association between LCω-3PUFAs and PC."
2017, 44 studies: pubmed.ncbi.nlm.nih.gov/273...
"Current evidence is insufficient to suggest a relationship between fish-derived omega-3 fatty acid and risk of PrCa. An association between higher omega-3 intake and decreased PrCa mortality may be present but more research is needed."
2021, 5607 men: pubmed.ncbi.nlm.nih.gov/335...
"We find no evidence in this study nor in a meta-analysis of similar studies that consuming n-3 PUFA-rich fish or using fish oil supplements affects the risk of PC."
Aspirin - My personal conclusion "take it or leave it" (possibly depending on if you're using Curcumin instead or if you have CVD risks you are trying to mitigate.)
It has a benefit of reducing Thromboxane A2 (TXA2), good for prevention of PCa metastasis, but even at the baby aspirin doses of 81mg/day, it also reduces PGI2 to a lesser degree (not good.) While at the same time increases risk of bleeding issues (moderately.) Taking 81mg every third day or 40mg every other day may strike a better balance between risk/reward. Disregarding the moderate bleeding risk issue, there's definitely more positive data out there regarding PCa (and recent regarding Breat Cancer) compared to Omega-3. It seems doing 40-80mg every other day or every third day if you are concerned about pre-existing cardiovascular risks seems logical? I honestly can't make up my mind on this one. If I had a rising PSA, I'd probably be inclined to go for it to hopefully help delay metastasis.
Curcumin - My personal conclusion "Possibly beneficial but be aware of interactions with your prescriptions."
Seems to be the least studied (as far as human studies) of the three for PCa. It appears to have strong evidence as a NSAID for people with arthritis and that's about it. Unlike Omega-3 though, I have not seen any negative data on it related to PCa, only positive, but it appears to be mostly all dishes or mice in a lab. Appears to have some of the same anti-platelet (TXA2 reduction) effects same as baby aspirin but weaker. Main benefit is its anti-inflammatory effect related to PCa progression. But again, where's the cold hard human data showing significant benefit? Apparently it can increase PGI2 which would help mitigate the GI tract negatives of aspirin so I've seen one study advocating both could be taken together. The dosage for a given form of Curcumin to have a significant benefit for PCa is anyone's guess if there is such a benefit. It apparently affects P450 so can make drugs that are metabolized through P450 have a more potent effect (especially avoid if taking something like Warfarin sounds like.)
Am I way off on any of these general conclusions?