Omega-3 may increase risk of prostate cancer in men?
This is one of those studies that invites more questions than it does answers. A study published in the American Journal of Epidemiology, found that men with the highest blood percentages of DHA — an omega-3 fatty acid commonly found in fatty fish such as salmon — have 2.5 times the risk of developing aggressive, high-grade prostate cancer compared to men with the lowest DHA levels. In other words, there’s an association between the two. (It’s not certain that x leads to y. Just an association at the moment.)
Omegas-3s are highly beneficial for cardiovascular health, so this study throws everything for a loop. Now, there are some holes in the story which invite more questions. Was the fish they ate farmed? What other details do we know about the men who developed prostate cancer, in particular about their lifestyle? If anything, this study reminds us that moderation is really the key to any healthy lifestyle.
Is it worth changing your diet because of this? Most definitely not. I’d continue eating as much fatty fish as possible. Afterall, heart disease is the real killer in this country.