According to recent study in the states,man who take this supplement can increase the risk up to 70%.
Source to follow
I will not be surprised if this study was paid for by the salmon industry.
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Subbed for the source and more info. There's plenty about this on the news at the moment but I'd like to see the actual published paper to see how the study was conducted, etc.
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Curious if we can get some of our more knowledgeable members, maybe coop, to weight in on this. Anyone seen/read the full paper?
Looks like a prospective cohort study, so it's unable to demonstrate cause-and-effect. However, the results of this study and previous studies are pretty constitent re: n-3 fatty acids and prostate cancer risk, so there is definitely cause for concern.
On a related note, I really liked the quote from the FHCRC researchers in the DailyMail article:
''There is really no evidence that taking dietary supplements is beneficial to health, and there is increasing evidence that taking high doses is harmful.''
This can't be stressed enough.
Also you can talk about outcomes like disease, or being alive or dead, but there is also quality of life to be considered. If taking omega-3 improves your quality if life, like for example your joints does it really make sense to stop using and maybe have to resort to using ibuprofen because you might have an increased chance of cancer? Also there's plenty of medical research showing benefits of omega-3 so I'm curious about this.
Men who eat a lot of oily fish or consume omega supplements should watch out, new research reveals that males with high blood concentrations of omega-3 fatty acids are at a higher risk of developing prostate cancer.
The finding comes from a large prospective study published in the Journal of the National Cancer Institute.
A 71 percent increased risk of high-grade prostate cancer and a 43 percent increase for all prostate cancers were associated with high concentrations of EPA, DHA, and DPA.
These results are consistent with a 2011 study carried out by the same research team which found that high concentrations of DHA more than doubled the risk of high-grade prostate cancer.
The researchers were shocked to find that higher blood levels of omega-3 fatty acids, usually promoted as good for the heart, were associated with a higher risk of aggressive prostate cancer.
The consistency of these findings could mean that "these fatty acids are involved in prostate tumorigenesis and recommendations to increase long-chain omega-3 fatty acid intake, in particular through supplementation, should consider its potential risks."
The paper's senior author and member of the Fred Hutch Public Health Sciences Division, Alan Kristal, Dr.P.H, said: "we've shown once again that use of nutritional supplements may be harmful."
Theodore Brasky, Ph.D., a research assistant professor at The Ohio State University Comprehensive Cancer Cente, added:
"What's important is that we have been able to replicate our findings from 2011 and we have confirmed that marine omega-3 fatty acids play a role in prostate cancer occurrence. It's important to note, however, that these results do not address the question of whether omega-3's play a detrimental role in prostate cancer prognosis."
The study compared the blood level concentrations of omega-3 fatty acids in 834 men who had been diagnosed with prostate cancer with samples from 1,393 men from the and Vitamin E Cancer Prevention Trial (SELECT).
The lowest risk group for developing prostate cancer had a 3.2 percent blood level concentration of omega-3 fatty acids, compared to 5.7 percent in the high risk group.
The results may come as a surprise to some, considering the number of positive health benefits that are associated with omega-3 fatty acids.
It remains uncertain why high concentrations of these fatty acids are associated with a heightened risk of prostate cancer.
Researchers say it is possible that omega-3 fatty acids are harmful because of they convert into compounds that can damage cells and DNA.
In conclusion, the finding suggests that high levels of omega-3 fatty acids can increase a man's risk of developing prostate cancer.
Written by Joseph Nordqvist
But studies also show that ejaculating more than 5 times a week lowers your risk of prostate cancer. My wife says she's helping prevent me from getting cancer.
In this case the researchers are right though. The evidence base of dietary supplements to prevent or treat diseases is often very low and while the forum bros like to ninja studies to prove their point they have no idea what actually constitutes a strong evidence base.
Honestly I can't think more than a handful of popular dietary supplement that have a strong evidence base to prevent or treat specific diseases (e.g. pregnant women taking folic acid to reduce the risk of spina bifida)
Vitamin D? We mainly have preliminary (observational) data.
Antioxidants and folic acid? They might actually increase cancer risk and mortality in the general population.
Omega 3? Insufficient evidence of efficacy in the secondary prevention of cardiovascular disease. The evidence base in psychiatric disorders and cancer is very low at best.
Glucosamine? Strong placebo.
And the list goes on and on. Obviously absence of evidence =/= evidence of absence, but the majority of dietary supplement claims or conjecture at best and fraud at worst.
In4 the forum brigade and their burning torches.
Life can cause an increased risk of cancer and death...